{"id":"CVE-2026-90698","aliases":["DEBIAN-CVE-2026-90698","EUVD-2026-77330","GHSA-xf89-37qr-gchh","OESA-2026-4101","RHSA-2026:63224","UBUNTU-CVE-2026-90698","USN-8792-1"],"status":"published","title":"memcached mcmc Tokenizer proto_text.c try_read_command_asciiauth out-of-bounds","description":"A security flaw has been discovered in memcached 1.6.41/1.6.42/1.6.43. This vulnerability affects the function try_read_command_asciiauth of the file proto_text.c of the component mcmc Tokenizer. The manipulation results in out-of-bounds read. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.44 is able to resolve this issue. The patch is identified as af05c9302bba508b736c3da1d5670f63fe8b7db4. You should upgrade the affected component.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00859,"percentile":0.58911,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-119","CWE-125"],"published":"2026-09-14T08:30:12Z","modified":"2026-10-28T11:19:31Z","fixes":[{"ecosystem":"Debian:14","package":"memcached","fixed_in":["1.6.45-1"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP4","package":"memcached","fixed_in":["1.6.42-2.oe2403sp4"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"memcached","fixed_in":["1.6.14-1ubuntu0.3"],"sources":["osv"]},{"ecosystem":"Ubuntu:24.04:LTS","package":"memcached","fixed_in":["1.6.24-1ubuntu0.3"],"sources":["osv"]},{"ecosystem":"Ubuntu:26.04:LTS","package":"memcached","fixed_in":["1.6.40-1ubuntu0.3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:13","package":"memcached","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.38-1","1.6.39-1","1.6.39-2","1.6.40-1","1.6.41-1","1.6.41-2","1.6.42-1","1.6.45-1"]},{"source":"osv","ecosystem":"Debian:14","package":"memcached","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.45-1"}]}],"versions":["1.6.38-1","1.6.39-1","1.6.39-2","1.6.40-1","1.6.41-1","1.6.41-2","1.6.42-1"]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP4","package":"memcached","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.42-2.oe2403sp4"}]}]},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"memcached","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:1.6.45-1.hum1"}]}],"bundled":2},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"memcached-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:1.6.45-1.hum1"}]}],"bundled":2},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"memcached-selinux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:1.6.45-1.hum1"}]}],"bundled":2},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"memcached","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.14-1ubuntu0.3"}]}],"versions":["1.6.9+dfsg-1build1","1.6.12+dfsg-2ubuntu1","1.6.12+dfsg-3","1.6.12+dfsg-4","1.6.13-1","1.6.14-1","1.6.14-1ubuntu0.1","1.6.14-1ubuntu0.2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"memcached","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.24-1ubuntu0.3"}]}],"versions":["1.6.21-1","1.6.22-1","1.6.23-1","1.6.24-1build1","1.6.24-1build3","1.6.24-1ubuntu0.1","1.6.24-1ubuntu0.2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"memcached","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.40-1ubuntu0.3"}]}],"versions":["1.6.38-1build1","1.6.39-2","1.6.40-1","1.6.40-1ubuntu0.1","1.6.40-1ubuntu0.2"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"memcached","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.14-1ubuntu0.3"}]}],"versions":["1.6.9+dfsg-1build1","1.6.12+dfsg-2ubuntu1","1.6.12+dfsg-3","1.6.12+dfsg-4","1.6.13-1","1.6.14-1","1.6.14-1ubuntu0.1","1.6.14-1ubuntu0.2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"memcached","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.24-1ubuntu0.3"}]}],"versions":["1.6.21-1","1.6.22-1","1.6.23-1","1.6.24-1build1","1.6.24-1build3","1.6.24-1ubuntu0.1","1.6.24-1ubuntu0.2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"memcached","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.40-1ubuntu0.3"}]}],"versions":["1.6.38-1build1","1.6.39-2","1.6.40-1","1.6.40-1ubuntu0.1","1.6.40-1ubuntu0.2"]}],"products":[{"vendor":"memcached","product":"memcached"}],"references":[{"url":"https://vuldb.com/vuln/403231","tags":["vdb-entry","technical-description","advisory","article","report"]},{"url":"https://vuldb.com/vuln/403231/cti","tags":["signature","permissions-required","report","article"]},{"url":"https://vuldb.com/cve/CVE-2026-90698","tags":["third-party-advisory","advisory","article","report"]},{"url":"https://vuldb.com/submit/916217","tags":["third-party-advisory","advisory","article","report"]},{"url":"https://vuldb.com/submit/916219","tags":["third-party-advisory","advisory","article","report"]},{"url":"https://protectiv.ph/research/memcached-asciiauth-empty-line-dos","tags":["exploit","evidence","article","report"]},{"url":"https://github.com/memcached/memcached/commit/af05c9302bba508b736c3da1d5670f63fe8b7db4","tags":["patch","fix","article"]},{"url":"https://github.com/memcached/memcached/releases/tag/1.6.44","tags":["patch","fix","article","report"]},{"url":"https://github.com/memcached/memcached/","tags":["product","web","article","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90698","tags":["advisory"]},{"url":"https://github.com/memcached/memcached"},{"url":"https://github.com/advisories/GHSA-xf89-37qr-gchh"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90698.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-90698","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4101","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:63224","tags":["advisory"]},{"url":"https://images.redhat.com/","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-90698","tags":["report"]},{"url":"https://access.redhat.com/security/updates/classification/","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-47783","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_63224.json","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2480089","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-47783","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47783","tags":["advisory"]},{"url":"https://github.com/memcached/memcached/commit/d13f282b4bce33a9c33b8a1bbf07f12114160fed","tags":["article"]},{"url":"https://github.com/memcached/memcached/compare/1.6.41...1.6.42","tags":["article"]},{"url":"https://github.com/memcached/memcached/wiki/ReleaseNotes1642","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532955","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90698","tags":["advisory","report"]},{"url":"https://ubuntu.com/security/CVE-2026-90698","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-8792-1","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-90698","title":"memcached mcmc Tokenizer proto_text.c try_read_command_asciiauth out-of-bounds","description":"A security flaw has been discovered in memcached 1.6.41/1.6.42/1.6.43. This vulnerability affects the function try_read_command_asciiauth of the file proto_text.c of the component mcmc Tokenizer. The manipulation results in out-of-bounds read. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.44 is able to resolve this issue. The patch is identified as af05c9302bba508b736c3da1d5670f63fe8b7db4. You should upgrade the affected component.","status":"published","published":"2026-09-14T08:30:12.665Z","modified":"2026-09-15T15:55:39.158Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","level":"medium","assessor":"cna"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","level":"medium","assessor":"cna"},{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","level":"medium","assessor":"cna"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C","assessor":"cna"}],"cwes":["CWE-125","CWE-119"],"updated_at":"2026-11-02T13:45:47.885058Z"}],"euvd":[{"id":"EUVD-2026-77330","description":"A security flaw has been discovered in memcached 1.6.41/1.6.42/1.6.43. This vulnerability affects the function try_read_command_asciiauth of the file proto_text.c of the component mcmc Tokenizer. The manipulation results in out-of-bounds read. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.44 is able to resolve this issue. The patch is identified as af05c9302bba508b736c3da1d5670f63fe8b7db4. You should upgrade the affected component.","status":"published","published":"2026-09-14T08:30:12Z","modified":"2026-09-15T15:55:39Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","level":"medium"}],"updated_at":"2026-11-02T17:28:17.768191Z"}],"ghsa":[{"id":"GHSA-xf89-37qr-gchh","title":"A security flaw has been discovered in memcached 1.6.41/1.6.42/1.6.43. This vulnerability affects...","description":"A security flaw has been discovered in memcached 1.6.41/1.6.42/1.6.43. This vulnerability affects the function try_read_command_asciiauth of the file proto_text.c of the component mcmc Tokenizer. The manipulation results in out-of-bounds read. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.44 is able to resolve this issue. The patch is identified as af05c9302bba508b736c3da1d5670f63fe8b7db4. You should upgrade the affected component.","status":"published","published":"2026-09-14T09:31:03Z","modified":"2026-09-14T09:31:09Z","cvss":[{"version":"4.0","score":5.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T15:11:48.80782Z"}],"nvd":[{"id":"CVE-2026-90698","description":"A security flaw has been discovered in memcached 1.6.41/1.6.42/1.6.43. This vulnerability affects the function try_read_command_asciiauth of the file proto_text.c of the component mcmc Tokenizer. The manipulation results in out-of-bounds read. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.44 is able to resolve this issue. The patch is identified as af05c9302bba508b736c3da1d5670f63fe8b7db4. You should upgrade the affected component.","status":"published","published":"2026-09-14T09:17:02.3Z","modified":"2026-09-15T16:17:40.657Z","cvss":[{"version":"4.0","score":5.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"secondary"}],"cwes":["CWE-119","CWE-125"],"updated_at":"2026-11-02T14:12:46.980627Z"}],"osv":[{"id":"CVE-2026-90698","title":"memcached mcmc Tokenizer proto_text.c try_read_command_asciiauth out-of-bounds","description":"A security flaw has been discovered in memcached 1.6.41/1.6.42/1.6.43. This vulnerability affects the function try_read_command_asciiauth of the file proto_text.c of the component mcmc Tokenizer. The manipulation results in out-of-bounds read. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.44 is able to resolve this issue. The patch is identified as af05c9302bba508b736c3da1d5670f63fe8b7db4. You should upgrade the affected component.","status":"published","published":"2026-09-14T08:30:12.665Z","modified":"2026-10-28T11:19:31.391542135Z","cvss":[{"version":"4.0","score":5.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","level":"medium"}],"cwes":["CWE-119","CWE-125"],"updated_at":"2026-11-02T15:45:20.269367Z"},{"id":"DEBIAN-CVE-2026-90698","description":"A security flaw has been discovered in memcached 1.6.41/1.6.42/1.6.43. This vulnerability affects the function try_read_command_asciiauth of the file proto_text.c of the component mcmc Tokenizer. The manipulation results in out-of-bounds read. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.44 is able to resolve this issue. The patch is identified as af05c9302bba508b736c3da1d5670f63fe8b7db4. You should upgrade the affected component.","status":"published","published":"2026-09-14T09:17:02.3Z","modified":"2026-10-01T03:03:53.13246659Z","cvss":[{"version":"4.0","score":5.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"updated_at":"2026-11-02T15:46:06.410207Z"},{"id":"OESA-2026-4101","title":"memcached security update","description":"memcached is a high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load.\r\n\r\nSecurity Fix(es):\n\nA security flaw has been discovered in memcached 1.6.41/1.6.42/1.6.43. This vulnerability affects the function try_read_command_asciiauth of the file proto_text.c of the component mcmc Tokenizer. The manipulation results in out-of-bounds read. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.44 is able to resolve this issue. The patch is identified as af05c9302bba508b736c3da1d5670f63fe8b7db4. You should upgrade the affected component.(CVE-2026-90698)","status":"published","published":"2026-09-25T01:28:24Z","modified":"2026-09-25T01:45:08.804184794Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:47.643553Z"},{"id":"RHSA-2026:63224","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-09-22T10:17:22Z","modified":"2026-09-22T10:31:30.68243694Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:21.91255Z"},{"id":"UBUNTU-CVE-2026-90698","description":"A security flaw has been discovered in memcached 1.6.41/1.6.42/1.6.43. This vulnerability affects the function try_read_command_asciiauth of the file proto_text.c of the component mcmc Tokenizer. The manipulation results in out-of-bounds read. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.6.44 is able to resolve this issue. The patch is identified as af05c9302bba508b736c3da1d5670f63fe8b7db4. You should upgrade the affected component.","status":"published","published":"2026-09-14T09:17:00Z","modified":"2026-09-25T00:42:00.319552344Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"},{"version":"4.0","score":5.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","level":"medium"}],"updated_at":"2026-11-02T16:57:35.676249Z"},{"id":"USN-8792-1","title":"memcached vulnerability","description":"It was discovered that Memcached incorrectly handled ASCII\nauthentication. A remote attacker could possibly use this issue to\ncause Memcached to crash, resulting in a denial of service.","status":"published","published":"2026-09-21T13:02:27Z","modified":"2026-09-21T21:42:47.702249518Z","updated_at":"2026-11-02T16:58:26.907654Z"}]}}