{"id":"CVE-2026-109869","aliases":["ALSA-2026:96088","ALSA-2026:96094","ALSA-2026:96234","CLSA-2026-1793099993","CLSA-2026-1793809172","CLSA-2026-1793809357","CLSA-2026-1793809399","CLSA-2026-1793973403","CLSA-2026-1794058909","CLSA-2026-1794310630","DEBIAN-CVE-2026-109869","EUVD-2026-102240","GHSA-xjj6-f33q-929c","RHSA-2026:84657","RHSA-2026:84706","RLSA-2026:96088","RLSA-2026:96094","RLSA-2026:96226","RLSA-2026:96234","UBUNTU-CVE-2026-109869"],"status":"published","title":"undici vulnerable to Denial of Service via unhandled error on excessive content-encodings","description":"undici is an HTTP client library for Node.js. In versions 6.23.0 through 6.29.0, 7.18.0 through 7.30.0, and 8.0.0 through 8.12.1, its fetch() implementation crashes the Node.js process when a malicious server returns a response with more than five content codings and closes the connection before sending the body. undici rejects such responses because of a content-encoding limit, but it created the internal response stream before that check and returned without attaching an error listener or aborting the request, so the early close surfaces a content-length mismatch on the orphaned stream, which Node.js treats as an unhandled error and terminates the process. A remote, unauthenticated server can trigger this with a single response, even when the application correctly catches the fetch() rejection, resulting in a denial of service. The issue is fixed in undici 6.29.1, 7.30.1, and 8.12.2, and users should upgrade to one of those versions or later. There is no workaround.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00344,"percentile":0.28123,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-248","CWE-459"],"published":"2026-10-15T18:08:31Z","modified":"2026-11-10T13:15:07Z","fixes":[{"ecosystem":"npm","package":"undici","fixed_in":["6.29.1","7.30.1","8.12.2"],"sources":["ghsa","osv"]},{"ecosystem":"TuxCare:npm","package":"undici","fixed_in":["6.28.0-tuxcare.5"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"node-undici","fixed_in":["8.12.2+dfsg+~cs3.2.3-1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"undici","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.23.0"},{"fixed":"6.29.1"}]}]},{"source":"ghsa","ecosystem":"npm","package":"undici","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.18.0"},{"fixed":"7.30.1"}]}]},{"source":"ghsa","ecosystem":"npm","package":"undici","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.0.0"},{"fixed":"8.12.2"}]}]},{"source":"osv","ecosystem":"AlmaLinux:10","package":"nodejs24","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:24.22.1-3.el10_2"}]}],"bundled":9},{"source":"osv","ecosystem":"AlmaLinux:10","package":"nodejs24-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:24.22.1-3.el10_2"}]}],"bundled":9},{"source":"osv","ecosystem":"AlmaLinux:10","package":"nodejs24-docs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:24.22.1-3.el10_2"}]}],"bundled":9},{"source":"osv","ecosystem":"AlmaLinux:10","package":"nodejs24-full-i18n","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:24.22.1-3.el10_2"}]}],"bundled":9},{"source":"osv","ecosystem":"AlmaLinux:10","package":"nodejs24-libs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:24.22.1-3.el10_2"}]}],"bundled":9},{"source":"osv","ecosystem":"AlmaLinux:10","package":"nodejs24-npm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:11.19.1-1.24.22.1.3.el10_2"}]}],"bundled":9},{"source":"osv","ecosystem":"AlmaLinux:10","package":"nodejs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:22.23.4-1.el10_2"}]}],"bundled":8},{"source":"osv","ecosystem":"AlmaLinux:10","package":"nodejs-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:22.23.4-1.el10_2"}]}],"bundled":8},{"source":"osv","ecosystem":"AlmaLinux:10","package":"nodejs-docs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:22.23.4-1.el10_2"}]}],"bundled":8},{"source":"osv","ecosystem":"AlmaLinux:10","package":"nodejs-full-i18n","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:22.23.4-1.el10_2"}]}],"bundled":8},{"source":"osv","ecosystem":"AlmaLinux:10","package":"nodejs-libs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:22.23.4-1.el10_2"}]}],"bundled":8},{"source":"osv","ecosystem":"AlmaLinux:10","package":"nodejs-npm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:10.9.9-1.22.23.4.1.el10_2"}]}],"bundled":8},{"source":"osv","ecosystem":"AlmaLinux:9","package":"nodejs-packaging","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.06-6.module_el9.7.0+227+12323393"}]}],"bundled":7},{"source":"osv","ecosystem":"AlmaLinux:9","package":"nodejs-packaging-bundler","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2021.06-6.module_el9.7.0+227+12323393"}]}],"bundled":7},{"source":"osv","ecosystem":"TuxCare:npm","package":"undici","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.24.4-tuxcare.0"},{"fixed":"7.24.4-tuxcare.4"}]}],"versions":["7.24.4","7.24.4-tuxcare.1","7.24.4-tuxcare.2","7.24.4-tuxcare.3"],"bundled":3},{"source":"osv","ecosystem":"TuxCare:npm","package":"undici","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.28.0-tuxcare.0"},{"fixed":"6.28.0-tuxcare.5"}]}],"versions":["6.28.0","6.28.0-tuxcare.1","6.28.0-tuxcare.2","6.28.0-tuxcare.3","6.28.0-tuxcare.4"]},{"source":"osv","ecosystem":"TuxCare:npm","package":"undici","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.28.0-tuxcare.0"},{"fixed":"7.28.0-tuxcare.9"}]}],"versions":["7.28.0","7.28.0-tuxcare.1","7.28.0-tuxcare.2","7.28.0-tuxcare.3","7.28.0-tuxcare.4","7.28.0-tuxcare.5","7.28.0-tuxcare.6","7.28.0-tuxcare.7","7.28.0-tuxcare.8"],"bundled":3},{"source":"osv","ecosystem":"TuxCare:npm","package":"undici","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.29.0-tuxcare.0"},{"fixed":"7.29.0-tuxcare.8"}]}],"versions":["7.29.0","7.29.0-tuxcare.1","7.29.0-tuxcare.2","7.29.0-tuxcare.3","7.29.0-tuxcare.4","7.29.0-tuxcare.5","7.29.0-tuxcare.6","7.29.0-tuxcare.7"],"bundled":3},{"source":"osv","ecosystem":"TuxCare:npm","package":"undici","ranges":[{"type":"ECOSYSTEM","eve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Advisory","advisory","web","article","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109869","tags":["advisory"]},{"url":"https://github.com/nodejs/undici/commit/07ded4941b1e72afec862958c3b8ddf468f3b429","tags":["web"]},{"url":"https://github.com/nodejs/undici/commit/1325a87dfb3492f8e87e6b0a84b3bda4e82e3436","tags":["web"]},{"url":"https://github.com/nodejs/undici/commit/b5084c7dc239172d75c336b1cd51ddac023938a5","tags":["web"]},{"url":"https://github.com/nodejs/undici/releases/tag/v6.29.1","tags":["web"]},{"url":"https://github.com/nodejs/undici/releases/tag/v7.30.1","tags":["web"]},{"url":"https://github.com/nodejs/undici/releases/tag/v8.12.2","tags":["web"]},{"url":"https://github.com/advisories/GHSA-xjj6-f33q-929c"},{"url":"https://access.redhat.com/errata/RHSA-2026:96088","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-102276","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-102278","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-105482","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-105483","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-106069","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-109383","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-109829","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-109869","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-87018","tags":["report"]},{"url":"https://bugzilla.redhat.com/2542700","tags":["report"]},{"url":"https://bugzilla.redhat.com/2542707","tags":["report"]},{"url":"https://bugzilla.redhat.com/2553656","tags":["report"]},{"url":"https://bugzilla.redhat.com/2553677","tags":["report"]},{"url":"https://bugzilla.redhat.com/2553678","tags":["report"]},{"url":"https://bugzilla.redhat.com/2553679","tags":["report"]},{"url":"https://bugzilla.redhat.com/2559870","tags":["report"]},{"url":"https://bugzilla.redhat.com/2559873","tags":["report"]},{"url":"https://bugzilla.redhat.com/2559875","tags":["report"]},{"url":"https://errata.almalinux.org/10/ALSA-2026-96088.html","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:96094","tags":["advisory"]},{"url":"https://errata.almalinux.org/10/ALSA-2026-96094.html","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:96234","tags":["advisory"]},{"url":"https://errata.almalinux.org/9/ALSA-2026-96234.html","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109869.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-109869","tags":["advisory"]},{"url":"https://github.com/nodejs/undici","tags":["package"]},{"url":"https://access.redhat.com/errata/RHSA-2026:84657","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-109841","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-109924","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-109932","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-87029","tags":["report"]},{"url":"https://access.redhat.com/security/updates/classification/","tags":["article"]},{"url":"https://images.redhat.com/","tags":["article"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_84657.json","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553677","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-87018","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-87018","tags":["advisory"]},{"url":"https://github.com/nodejs/undici/security/advisories/GHSA-qrxm-fqhp-jwvm","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553726","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-87029","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-87029","tags":["advisory"]},{"url":"https://github.com/nodejs/undici/security/advisories/GHSA-55wc-3pg8-jfw6","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2542707","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-102276","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102276","tags":["advisory"]},{"url":"https://github.com/juliangruber/brace-expansion/commit/0bcbfc0a5928c3073d48f42999d1ce4fc1c42fbc","tags":["article"]},{"url":"https://github.com/juliangruber/brace-expansion/commit/316359e6019c39b3254c8ba8e25dc586a480652c","tags":["article"]},{"url":"https://github.com/juliangruber/brace-expansion/commit/5171e681c0922b7ae8bfaf9a331e309107be6edc","tags":["article"]},{"url":"https://github.com/juliangruber/brace-expansion/commit/6735c94873ca570bcdd6a0690033bdd3126379d3","tags":["article"]},{"url":"https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-6j4f-fj2g-mc7p","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553678","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-109383","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109383","tags":["advisory"]},{"url":"https://github.com/nodejs/undici/commit/f75eac00ac17","tags":["article"]},{"url":"https://github.com/nodejs/undici/security/advisories/GHSA-2m5v-pch6-74hx","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553679","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-109829","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109829","tags":["advisory"]},{"url":"https://github.com/nodejs/undici/commit/26c2bfb3def0","tags":["article"]},{"url":"https://github.com/nodejs/undici/security/advisories/GHSA-4w7w-5xrc-9h26","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553669","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-109841","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109841","tags":["advisory"]},{"url":"https://github.com/nodejs/undici/commit/4f7ef6806e53","tags":["article"]},{"url":"https://github.com/nodejs/undici/security/advisories/GHSA-f72v-6w45-q472","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553656","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-109869","tags":["advisory","report"]},{"url":"https://github.com/nodejs/undici/commit/b5084c7dc239","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553663","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-109924","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109924","tags":["advisory"]},{"url":"https://github.com/nodejs/undici/commit/789ef26461c","tags":["article"]},{"url":"https://github.com/nodejs/undici/security/advisories/GHSA-4qv8-2p9j-2685","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553687","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-109932","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109932","tags":["advisory"]},{"url":"https://github.com/nodejs/undici/security/advisories/GHSA-9fm3-97px-rjf6","tags":["article"]},{"url":"https://access.redhat.com/errata/RHSA-2026:84706","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_84706.json","tags":["advisory"]},{"url":"https://errata.rockylinux.org/RLSA-2026:96088","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2542700","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2559870","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2559873","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2559875","tags":["report"]},{"url":"https://errata.rockylinux.org/RLSA-2026:96094","tags":["advisory"]},{"url":"https://errata.rockylinux.org/RLSA-2026:96226","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2528759","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2563607","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2563953","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2563955","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2563978","tags":["report"]},{"url":"https://access.redhat.com/errata/RHSA-2026:96226","tags":["advisory"]},{"url":"https://errata.rockylinux.org/RLSA-2026:96234","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-109869","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-109869","title":"undici vulnerable to Denial of Service via unhandled error on excessive content-encodings","description":"undici is an HTTP client library for Node.js. In versions 6.23.0 through 6.29.0, 7.18.0 through 7.30.0, and 8.0.0 through 8.12.1, its fetch() implementation crashes the Node.js process when a malicious server returns a response with more than five content codings and closes the connection before sending the body. undici rejects such responses because of a content-encoding limit, but it created the internal response stream before that check and returned without attaching an error listener or aborting the request, so the early close surfaces a content-length mismatch on the orphaned stream, which Node.js treats as an unhandled error and terminates the process. A remote, unauthenticated server can trigger this with a single response, even when the application correctly catches the fetch() rejection, resulting in a denial of service. The issue is fixed in undici 6.29.1, 7.30.1, and 8.12.2, and users should upgrade to one of those versions or later. There is no workaround.","status":"published","published":"2026-10-15T18:08:31.243Z","modified":"2026-10-16T20:06:00.782Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-248","CWE-459"],"updated_at":"2026-11-02T14:20:11.581788Z"}],"euvd":[{"id":"EUVD-2026-102240","description":"undici is an HTTP client library for Node.js. In versions 6.23.0 through 6.29.0, 7.18.0 through 7.30.0, and 8.0.0 through 8.12.1, its fetch() implementation crashes the Node.js process when a malicious server returns a response with more than five content codings and closes the connection before sending the body. undici rejects such responses because of a content-encoding limit, but it created the internal response stream before that check and returned without attaching an error listener or aborting the request, so the early close surfaces a content-length mismatch on the orphaned stream, which Node.js treats as an unhandled error and terminates the process. A remote, unauthenticated server can trigger this with a single response, even when the application correctly catches the fetch() rejection, resulting in a denial of service. The issue is fixed in undici 6.29.1, 7.30.1, and 8.12.2, and users should upgrade to one of those versions or later. There is no workaround.","status":"published","published":"2026-10-15T18:08:31Z","modified":"2026-10-16T20:06:00Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T17:00:01.858348Z"}],"ghsa":[{"id":"GHSA-xjj6-f33q-929c","title":"undici vulnerable to Denial of Service via unhandled error on excessive content-encodings","description":"### Impact\n\nundici's `fetch()` crashes the Node.js process when a malicious server returns a response with more than five content codings and closes the connection before sending the body. undici rejects such responses (a content-encoding limit), but it created the internal response stream before that check and returned without attaching an error listener or aborting the request. The early close then surfaces a content-length mismatch on that orphaned internal stream, which Node.js treats as an unhandled `error` and terminates the process. A remote, unauthenticated server can trigger this with a single response, even when the application correctly catches the `fetch()` rejection. undici 6.x, 7.x, and 8.x are affected.\n\n### Patches\n\nUpgrade to `6.29.1`, `7.30.1`, or `8.12.2`. undici now validates the content-encoding chain before creating the internal body stream and aborts the response when the limit is exceeded, so no error can surface on an orphaned stream.\n\n### Workarounds\n\nNone.","status":"published","published":"2026-10-23T22:14:31Z","modified":"2026-10-23T22:14:32Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-248","CWE-459"],"updated_at":"2026-11-02T14:41:36.858527Z"}],"nvd":[{"id":"CVE-2026-109869","description":"undici is an HTTP client library for Node.js. In versions 6.23.0 through 6.29.0, 7.18.0 through 7.30.0, and 8.0.0 through 8.12.1, its fetch() implementation crashes the Node.js process when a malicious server returns a response with more than five content codings and closes the connection before sending the body. undici rejects such responses because of a content-encoding limit, but it created the internal response stream before that check and returned without attaching an error listener or aborting the request, so the early close surfaces a content-length mismatch on the orphaned stream, which Node.js treats as an unhandled error and terminates the process. A remote, unauthenticated server can trigger this with a single response, even when the application correctly catches the fetch() rejection, resulting in a denial of service. The issue is fixed in undici 6.29.1, 7.30.1, and 8.12.2, and users should upgrade to one of those versions or later. There is no workaround.","status":"published","published":"2026-10-15T19:17:21.77Z","modified":"2026-10-19T20:45:20.34Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-248","CWE-459"],"updated_at":"2026-11-02T14:12:59.751798Z"}],"osv":[{"id":"CVE-2026-109869","title":"undici vulnerable to Denial of Service via unhandled error on excessive content-encodings","description":"undici is an HTTP client library for Node.js. In versions 6.23.0 through 6.29.0, 7.18.0 through 7.30.0, and 8.0.0 through 8.12.1, its fetch() implementation crashes the Node.js process when a malicious server returns a response with more than five content codings and closes the connection before sending the body. undici rejects such responses because of a content-encoding limit, but it created the internal response stream before that check and returned without attaching an error listener or aborting the request, so the early close surfaces a content-length mismatch on the orphaned stream, which Node.js treats as an unhandled error and terminates the process. A remote, unauthenticated server can trigger this with a single response, even when the application correctly catches the fetch() rejection, resulting in a denial of service. The issue is fixed in undici 6.29.1, 7.30.1, and 8.12.2, and users should upgrade to one of those versions or later. There is no workaround.","status":"published","published":"2026-10-15T18:08:31.243Z","modified":"2026-11-10T12:12:22.339287378Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-248","CWE-459"],"updated_at":"2026-11-10T11:27:53.954741Z"},{"id":"DEBIAN-CVE-2026-109869","description":"undici is an HTTP client library for Node.js. In versions 6.23.0 through 6.29.0, 7.18.0 through 7.30.0, and 8.0.0 through 8.12.1, its fetch() implementation crashes the Node.js process when a malicious server returns a response with more than five content codings and closes the connection before sending the body. undici rejects such responses because of a content-encoding limit, but it created the internal response stream before that check and returned without attaching an error listener or aborting the request, so the early close surfaces a content-length mismatch on the orphaned stream, which Node.js treats as an unhandled error and terminates the process. A remote, unauthenticated server can trigger this with a single response, even when the application correctly catches the fetch() rejection, resulting in a denial of service. The issue is fixed in undici 6.29.1, 7.30.1, and 8.12.2, and users should upgrade to one of those versions or later. There is no workaround.","status":"published","published":"2026-10-15T19:17:21.77Z","modified":"2026-11-01T05:00:06.132569311Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:49.381767Z"},{"id":"GHSA-xjj6-f33q-929c","title":"undici vulnerable to Denial of Service via unhandled error on excessive content-encodings","description":"### Impact\n\nundici's `fetch()` crashes the Node.js process when a malicious server returns a response with more than five content codings and closes the connection before sending the body. undici rejects such responses (a content-encoding limit), but it created the internal response stream before that check and returned without attaching an error listener or aborting the request. The early close then surfaces a content-length mismatch on that orphaned internal stream, which Node.js treats as an unhandled `error` and terminates the process. A remote, unauthenticated server can trigger this with a single response, even when the application correctly catches the `fetch()` rejection. undici 6.x, 7.x, and 8.x are affected.\n\n### Patches\n\nUpgrade to `6.29.1`, `7.30.1`, or `8.12.2`. undici now validates the content-encoding chain before creating the internal body stream and aborts the response when the limit is exceeded, so no error can surface on an orphaned stream.\n\n### Workarounds\n\nNone.","status":"published","published":"2026-10-23T22:14:31Z","modified":"2026-10-23T22:30:05.007687918Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-248","CWE-459"],"updated_at":"2026-11-02T15:47:00.198893Z"},{"id":"RHSA-2026:84657","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update","status":"published","published":"2026-10-20T10:17:41Z","modified":"2026-10-20T10:43:33.48989051Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:23.547034Z"},{"id":"RHSA-2026:84706","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update","status":"published","published":"2026-10-20T10:17:45Z","modified":"2026-10-20T10:43:36.699091514Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:23.547034Z"},{"id":"RLSA-2026:96088","title":"Important: nodejs24 security, bug fix, and enhancement update","description":"Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.\n\nSecurity Fix(es):\n\n* brace-expansion: brace-expansion: Denial of Service via uncontrolled recursion in nested brace patterns (CVE-2026-102278)\n\n* brace-expansion: brace-expansion: Denial of Service via stack exhaustion from crafted brace patterns (CVE-2026-102276)\n\n* undici: undici: Denial of Service via unhandled stream error on excessive content encodings (CVE-2026-109869)\n\n* undici: undici: Denial of Service via TLS renegotiation with mismatched certificate (CVE-2026-87018)\n\n* undici: undici: Certificate validation bypass via dropped TLS options in Agent (CVE-2026-109383)\n\n* undici: undici: Cache poisoning and information disclosure via improper cross-origin redirect caching (CVE-2026-109829)\n\n* nodejs: nodejs: TLS certificate hostname bypass via fullwidth-digit IP hostnames (CVE-2026-105483)\n\n* nodejs: nodejs: TLS certificate hostname bypass via non-canonical IP hostnames (CVE-2026-106069)\n\n* nodejs: nodejs: dns.resolve truncates hostnames containing a NUL character (CVE-2026-105482)\n\nBug Fix(es) and Enhancement(s):\n\n* nodejs24: Rebase to the latest Node.js 24 release [rhel-10.2.z] (JIRA:Rocky Linux-295759)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-11-10T12:09:45.660151Z","modified":"2026-11-10T12:30:02.486941765Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-10T12:59:04.624749Z"},{"id":"RLSA-2026:96094","title":"Important: nodejs22 security update","description":"Node.js is a platform built on Chrome's JavaScript runtime \\ for easily building fast, scalable network applications. \\ Node.js uses an event-driven, non-blocking I/O model that \\ makes it lightweight and efficient, perfect for data-intensive \\ real-time applications that run across distributed devices.\n\nSecurity Fix(es):\n\n* brace-expansion: brace-expansion: Denial of Service via uncontrolled recursion in nested brace patterns (CVE-2026-102278)\n\n* brace-expansion: brace-expansion: Denial of Service via stack exhaustion from crafted brace patterns (CVE-2026-102276)\n\n* undici: undici: Denial of Service via unhandled stream error on excessive content encodings (CVE-2026-109869)\n\n* undici: undici: Denial of Service via TLS renegotiation with mismatched certificate (CVE-2026-87018)\n\n* undici: undici: Certificate validation bypass via dropped TLS options in Agent (CVE-2026-109383)\n\n* undici: undici: Cache poisoning and information disclosure via improper cross-origin redirect caching (CVE-2026-109829)\n\n* nodejs: nodejs: TLS certificate hostname bypass via non-canonical IP hostnames (CVE-2026-106069)\n\n* nodejs: nodejs: dns.resolve truncates hostnames containing a NUL character (CVE-2026-105482)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-11-10T12:09:45.660151Z","modified":"2026-11-10T12:30:02.483801869Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-10T12:59:04.624749Z"},{"id":"RLSA-2026:96226","title":"Important: nodejs:24 security update","description":"Node.js is a software development platform for building fast and scalable network applications in the JavaScript programming language. \n\nSecurity Fix(es):\n\n* undici: undici: Denial of Service via unrequested WebSocket subprotocol (CVE-2026-19534)\n\n* brace-expansion: brace-expansion: Denial of Service via uncontrolled recursion in nested brace patterns (CVE-2026-102278)\n\n* brace-expansion: brace-expansion: Denial of Service via stack exhaustion from crafted brace patterns (CVE-2026-102276)\n\n* undici: undici: Denial of Service via unhandled stream error on excessive content encodings (CVE-2026-109869)\n\n* undici: undici: Denial of Service via TLS renegotiation with mismatched certificate (CVE-2026-87018)\n\n* undici: undici: Certificate validation bypass via dropped TLS options in Agent (CVE-2026-109383)\n\n* minimatch: minimatch: Denial of Service via crafted glob pattern expansion (CVE-2026-118764)\n\n* sqlite: sqlite: Denial of service via heap-based buffer overflow in FTS5 (CVE-2026-119373)\n\n* sqlite: sqlite: Arbitrary code execution via crafted session changesets (CVE-2026-119379)\n\n* sqlite: sqlite: Arbitrary code execution via corrupted FTS5 index (CVE-2026-119374)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-11-10T00:04:46.01358Z","modified":"2026-11-10T00:30:02.627957336Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-10T00:42:40.753497Z"},{"id":"RLSA-2026:96234","title":"Important: nodejs:22 security, bug fix, and enhancement update","description":"Node.js is a software development platform for building fast and scalable network applications in the JavaScript programming language. \n\nSecurity Fix(es):\n\n* brace-expansion: brace-expansion: Denial of Service via uncontrolled recursion in nested brace patterns (CVE-2026-102278)\n\n* brace-expansion: brace-expansion: Denial of Service via stack exhaustion from crafted brace patterns (CVE-2026-102276)\n\n* undici: undici: Denial of Service via unhandled stream error on excessive content encodings (CVE-2026-109869)\n\n* undici: undici: Denial of Service via TLS renegotiation with mismatched certificate (CVE-2026-87018)\n\n* undici: undici: Certificate validation bypass via dropped TLS options in Agent (CVE-2026-109383)\n\n* nodejs: nodejs: TLS certificate hostname bypass via non-canonical IP hostnames (CVE-2026-106069)\n\n* nodejs: nodejs: dns.resolve truncates hostnames containing a NUL character (CVE-2026-105482)\n\nBug Fix(es) and Enhancement(s):\n\n* nodejs:22/nodejs: Rebase to the latest Node.js 22 release [rhel-9.8.z] (JIRA:Rocky Linux-302833)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-11-10T00:04:46.01358Z","modified":"2026-11-10T00:30:02.627933753Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-10T00:42:40.753497Z"},{"id":"UBUNTU-CVE-2026-109869","description":"undici is an HTTP client library for Node.js. In versions 6.23.0 through 6.29.0, 7.18.0 through 7.30.0, and 8.0.0 through 8.12.1, its fetch() implementation crashes the Node.js process when a malicious server returns a response with more than five content codings and closes the connection before sending the body. undici rejects such responses because of a content-encoding limit, but it created the internal response stream before that check and returned without attaching an error listener or aborting the request, so the early close surfaces a content-length mismatch on the orphaned stream, which Node.js treats as an unhandled error and terminates the process. A remote, unauthenticated server can trigger this with a single response, even when the application correctly catches the fetch() rejection, resulting in a denial of service. The issue is fixed in undici 6.29.1, 7.30.1, and 8.12.2, and users should upgrade to one of those versions or later. There is no workaround.","status":"published","published":"2026-10-15T19:17:00Z","modified":"2026-10-28T17:50:33Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:55:59.591851Z"},{"id":"ALSA-2026:96088","title":"Important: nodejs24 security, bug fix, and enhancement update","description":"Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.  \n\nSecurity Fix(es):  \n\n  * brace-expansion: brace-expansion: Denial of Service via uncontrolled recursion in nested brace patterns (CVE-2026-102278)\n  * brace-expansion: brace-expansion: Denial of Service via stack exhaustion from crafted brace patterns (CVE-2026-102276)\n  * undici: undici: Denial of Service via unhandled stream error on excessive content encodings (CVE-2026-109869)\n  * undici: undici: Denial of Service via TLS renegotiation with mismatched certificate (CVE-2026-87018)\n  * undici: undici: Certificate validation bypass via dropped TLS options in Agent (CVE-2026-109383)\n  * undici: undici: Cache poisoning and information disclosure via improper cross-origin redirect caching (CVE-2026-109829)\n  * nodejs: nodejs: TLS certificate hostname bypass via fullwidth-digit IP hostnames (CVE-2026-105483)\n  * nodejs: nodejs: TLS certificate hostname bypass via non-canonical IP hostnames (CVE-2026-106069)\n  * nodejs: nodejs: dns.resolve truncates hostnames containing a NUL character (CVE-2026-105482)\n\n\nBug Fix(es) and Enhancement(s):  \n\n  * nodejs24: Rebase to the latest Node.js 24 release [rhel-10.2.z] (JIRA:RHEL-295759)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","status":"published","published":"2026-11-09T00:00:00Z","modified":"2026-11-10T12:00:02.3776558Z","updated_at":"2026-11-10T12:28:36.765058Z"},{"id":"ALSA-2026:96094","title":"Important: nodejs22 security update","description":"Node.js is a platform built on Chrome's JavaScript runtime \\ for easily building fast, scalable network applications. \\ Node.js uses an event-driven, non-blocking I/O model that \\ makes it lightweight and efficient, perfect for data-intensive \\ real-time applications that run across distributed devices.  \n\nSecurity Fix(es):  \n\n  * brace-expansion: brace-expansion: Denial of Service via uncontrolled recursion in nested brace patterns (CVE-2026-102278)\n  * brace-expansion: brace-expansion: Denial of Service via stack exhaustion from crafted brace patterns (CVE-2026-102276)\n  * undici: undici: Denial of Service via unhandled stream error on excessive content encodings (CVE-2026-109869)\n  * undici: undici: Denial of Service via TLS renegotiation with mismatched certificate (CVE-2026-87018)\n  * undici: undici: Certificate validation bypass via dropped TLS options in Agent (CVE-2026-109383)\n  * undici: undici: Cache poisoning and information disclosure via improper cross-origin redirect caching (CVE-2026-109829)\n  * nodejs: nodejs: TLS certificate hostname bypass via non-canonical IP hostnames (CVE-2026-106069)\n  * nodejs: nodejs: dns.resolve truncates hostnames containing a NUL character (CVE-2026-105482)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","status":"published","published":"2026-11-09T00:00:00Z","modified":"2026-11-10T12:00:02.399791109Z","updated_at":"2026-11-10T12:28:36.765058Z"},{"id":"ALSA-2026:96234","title":"Important: nodejs:22 security, bug fix, and enhancement update","description":"Node.js is a software development platform for building fast and scalable network applications in the JavaScript programming language.   \n\nSecurity Fix(es):  \n\n  * brace-expansion: brace-expansion: Denial of Service via uncontrolled recursion in nested brace patterns (CVE-2026-102278)\n  * brace-expansion: brace-expansion: Denial of Service via stack exhaustion from crafted brace patterns (CVE-2026-102276)\n  * undici: undici: Denial of Service via unhandled stream error on excessive content encodings (CVE-2026-109869)\n  * undici: undici: Denial of Service via TLS renegotiation with mismatched certificate (CVE-2026-87018)\n  * undici: undici: Certificate validation bypass via dropped TLS options in Agent (CVE-2026-109383)\n  * nodejs: nodejs: TLS certificate hostname bypass via non-canonical IP hostnames (CVE-2026-106069)\n  * nodejs: nodejs: dns.resolve truncates hostnames containing a NUL character (CVE-2026-105482)\n\n\nBug Fix(es) and Enhancement(s):  \n\n  * nodejs:22/nodejs: Rebase to the latest Node.js 22 release [rhel-9.8.z] (JIRA:RHEL-302833)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","status":"published","published":"2026-11-09T00:00:00Z","modified":"2026-11-10T10:45:02.706366594Z","updated_at":"2026-11-10T10:57:25.458985Z"},{"id":"CLSA-2026-1793099993","title":"TuxCare security update for undici (3 CVEs)","description":"TuxCare rebuilt undici to address 3 CVEs. Fixed in 7.24.4-tuxcare.4.","status":"published","published":"2026-10-27T11:19:53Z","modified":"2026-10-27T13:30:08.305551151Z","updated_at":"2026-11-02T15:43:55.34846Z"},{"id":"CLSA-2026-1793809172","title":"TuxCare security update for undici (1 CVE)","description":"TuxCare rebuilt undici to address 1 CVE. Fixed in 6.28.0-tuxcare.5.","status":"published","published":"2026-11-04T17:19:33Z","modified":"2026-11-04T19:00:39.154629498Z","updated_at":"2026-11-04T19:15:03.6858Z"},{"id":"CLSA-2026-1793809357","title":"TuxCare security update for undici (3 CVEs)","description":"TuxCare rebuilt undici to address 3 CVEs. Fixed in 7.28.0-tuxcare.9.","status":"published","published":"2026-11-04T17:22:38Z","modified":"2026-11-04T19:00:35.346388915Z","updated_at":"2026-11-04T19:15:03.6858Z"},{"id":"CLSA-2026-1793809399","title":"TuxCare security update for undici (3 CVEs)","description":"TuxCare rebuilt undici to address 3 CVEs. Fixed in 7.29.0-tuxcare.8.","status":"published","published":"2026-11-04T17:23:20Z","modified":"2026-11-04T19:00:35.350027838Z","updated_at":"2026-11-04T19:15:03.6858Z"},{"id":"CLSA-2026-1793973403","title":"TuxCare security update for undici (7 CVEs)","description":"TuxCare rebuilt undici to address 7 CVEs. Fixed in 7.29.1-tuxcare.1.","status":"published","published":"2026-11-06T14:56:44Z","modified":"2026-11-06T19:00:03.416565041Z","updated_at":"2026-11-06T19:05:31.753133Z"},{"id":"CLSA-2026-1794058909","title":"TuxCare security update for undici (4 CVEs)","description":"TuxCare rebuilt undici to address 4 CVEs. Fixed in 6.28.1-tuxcare.1.","status":"published","published":"2026-11-07T14:41:50Z","modified":"2026-11-07T19:00:38.701320866Z","updated_at":"2026-11-07T19:21:34.633914Z"},{"id":"CLSA-2026-1794310630","title":"TuxCare security update for undici (14 CVEs)","description":"TuxCare rebuilt undici to address 14 CVEs. Fixed in 7.24.8-tuxcare.1.","status":"published","published":"2026-11-10T12:37:11Z","modified":"2026-11-10T13:15:07.241296257Z","updated_at":"2026-11-10T13:29:51.103746Z"}]}}