{"id":"CVE-2026-93748","aliases":["AZL-103448","AZL-103485","CLSA-2026-1792231034","CLSA-2026-1792743662","DEBIAN-CVE-2026-93748","EUVD-2026-83253","GHSA-ch52-4w7c-c8xp","ROOT-APP-NPM-CVE-2026-93748","UBUNTU-CVE-2026-93748"],"status":"published","title":"http-cache-semantics through 4.2.0 Cross-User Cache Disclosure via max-stale","description":"http-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unauthenticated attackers to retrieve cached responses belonging to other users. Attackers can request the same URL with a large max-stale value to obtain another user's Set-Cookie session credentials from shared-cache entries that were deliberately zeroed for security reasons.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00596,"percentile":0.4883,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-524"],"published":"2026-09-18T17:51:34Z","modified":"2026-11-05T14:40:44Z","fixes":[{"ecosystem":"TuxCare:npm","package":"http-cache-semantics","fixed_in":["3.8.1-tuxcare.4","4.2.0-tuxcare.1"],"sources":["osv"]},{"ecosystem":"Root:npm","package":"http-cache-semantics","fixed_in":["3.8.1-aikido.3","4.2.0-aikido.1","4.1.1-aikido.1"],"sources":["osv"]},{"ecosystem":"Root:npm","package":"@rootio/http-cache-semantics","fixed_in":["3.8.1-root.io.3","4.2.0-root.io.1","4.1.1-root.io.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Azure Linux:3","package":"nodejs-nodemon","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.0.3-5"}]}]},{"source":"osv","ecosystem":"Azure Linux:3","package":"python-tensorboard","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.16.2-6"}]}]},{"source":"osv","ecosystem":"TuxCare:npm","package":"http-cache-semantics","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.8.1-tuxcare.0"},{"fixed":"3.8.1-tuxcare.4"}]}],"versions":["3.8.1","3.8.1-tuxcare.1","3.8.1-tuxcare.2","3.8.1-tuxcare.3"]},{"source":"osv","ecosystem":"TuxCare:npm","package":"http-cache-semantics","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.2.0-tuxcare.0"},{"fixed":"4.2.0-tuxcare.1"}]}],"versions":["4.2.0"]},{"source":"osv","ecosystem":"Debian:12","package":"node-got","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["11.8.5+~cs58.13.36-3","11.8.5+~cs58.13.36-4","11.8.5+~cs58.13.36-5","11.8.5+~cs58.13.36-6","11.8.5+~cs58.13.36-7","11.8.5+~cs58.13.36-8","11.8.6+~cs58.13.36-1"]},{"source":"osv","ecosystem":"Debian:13","package":"node-got","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["11.8.5+~cs58.13.36-5","11.8.5+~cs58.13.36-6","11.8.5+~cs58.13.36-7","11.8.5+~cs58.13.36-8","11.8.6+~cs58.13.36-1"]},{"source":"osv","ecosystem":"Debian:14","package":"node-got","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["11.8.5+~cs58.13.36-5","11.8.5+~cs58.13.36-6","11.8.5+~cs58.13.36-7","11.8.5+~cs58.13.36-8","11.8.6+~cs58.13.36-1"]},{"source":"osv","ecosystem":"Root:npm","package":"http-cache-semantics","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.8.1-aikido.3"},{"fixed":"4.2.0-aikido.1"},{"fixed":"4.1.1-aikido.1"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@rootio/http-cache-semantics","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.8.1-root.io.3"},{"fixed":"4.2.0-root.io.1"},{"fixed":"4.1.1-root.io.1"}]}]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"node-got","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.1.0-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"node-got","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.1.0-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"node-got","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["11.8.1+~cs53.13.17-3","11.8.2+~cs58.7.32-2","11.8.3+~cs58.7.37-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"node-got","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["11.8.5+~cs58.13.36-3"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"node-got","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["11.8.5+~cs58.13.36-6","11.8.5+~cs58.13.36-7"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"node-got","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["11.8.5+~cs58.13.36-5","11.8.5+~cs58.13.36-6"]}],"products":[{"vendor":"kornelski","product":"http-cache-semantics"}],"references":[{"url":"https://github.com/kornelski/http-cache-semantics/issues/56","tags":["issue-tracking","web","report"]},{"url":"https://github.com/kornelski/http-cache-semantics","tags":["product","package","report"]},{"url":"https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.js#L425-L441","tags":["technical-description","web","report"]},{"url":"https://github.com/kornelski/http-cache-semantics/blob/f01112e954b83cfa8765b633ba880e5e980aa54c/index.js#L603-L623","tags":["technical-description","web","report"]},{"url":"https://www.vulncheck.com/advisories/http-cache-semantics-through-4.2.0-cross-user-cache-disclosure-via-max-stale","tags":["third-party-advisory","web","report"]},{"url":"https://github.com/kornelski/http-cache-semantics/issues/56#issuecomment-5975759591","tags":["web"]},{"url":"https://github.com/advisories/GHSA-ch52-4w7c-c8xp"},{"url":"https://github.com/github/advisory-database/issues/10139"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93748","tags":["web","advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-93748","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-93748","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93748","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-93748","title":"http-cache-semantics through 4.2.0 Cross-User Cache Disclosure via max-stale","description":"http-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unauthenticated attackers to retrieve cached responses belonging to other users. Attackers can request the same URL with a large max-stale value to obtain another user's Set-Cookie session credentials from shared-cache entries that were deliberately zeroed for security reasons.","status":"published","published":"2026-09-18T17:51:34.262Z","modified":"2026-11-05T14:40:44.021Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-524"],"updated_at":"2026-11-05T16:36:34.343037Z"}],"euvd":[{"id":"EUVD-2026-83253","description":"http-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unauthenticated attackers to retrieve cached responses belonging to other users. Attackers can request the same URL with a large max-stale value to obtain another user's Set-Cookie session credentials from shared-cache entries that were deliberately zeroed for security reasons.","status":"published","published":"2026-09-18T17:51:34Z","modified":"2026-11-05T14:40:44Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-05T16:59:57.067043Z"}],"ghsa":[{"id":"GHSA-ch52-4w7c-c8xp","title":"Withdrawn Advisory: http-cache-semantics max-stale handling can disclose cross-user cached responses","description":"### Withdrawn Advisory\nThis advisory has been withdrawn because it's not a valid vulnerability. This link is maintained to preserve external references.\n\n### Original Description\nhttp-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unauthenticated attackers to retrieve cached responses belonging to other users. Attackers can request the same URL with a large max-stale value to obtain another user's Set-Cookie session credentials from shared-cache entries that were deliberately zeroed for security reasons.","status":"withdrawn","published":"2026-09-18T18:31:44Z","modified":"2026-10-28T21:13:40Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-524"],"updated_at":"2026-11-02T14:41:39.926569Z"}],"nvd":[{"id":"CVE-2026-93748","description":"http-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unauthenticated attackers to retrieve cached responses belonging to other users. Attackers can request the same URL with a large max-stale value to obtain another user's Set-Cookie session credentials from shared-cache entries that were deliberately zeroed for security reasons.","status":"published","published":"2026-09-18T18:18:33.33Z","modified":"2026-11-05T15:17:27.427Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/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":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-524"],"updated_at":"2026-11-05T19:56:00.556424Z"}],"osv":[{"id":"DEBIAN-CVE-2026-93748","description":"http-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unauthenticated attackers to retrieve cached responses belonging to other users. Attackers can request the same URL with a large max-stale value to obtain another user's Set-Cookie session credentials from shared-cache entries that were deliberately zeroed for security reasons.","status":"published","published":"2026-09-18T18:18:33.33Z","modified":"2026-11-06T09:47:29.4060385Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/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":"high"}],"updated_at":"2026-11-06T10:07:55.88234Z"},{"id":"GHSA-ch52-4w7c-c8xp","title":"Withdrawn Advisory: http-cache-semantics max-stale handling can disclose cross-user cached responses","description":"### Withdrawn Advisory\nThis advisory has been withdrawn because it's not a valid vulnerability. This link is maintained to preserve external references.\n\n### Original Description\nhttp-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unauthenticated attackers to retrieve cached responses belonging to other users. Attackers can request the same URL with a large max-stale value to obtain another user's Set-Cookie session credentials from shared-cache entries that were deliberately zeroed for security reasons.","status":"withdrawn","published":"2026-09-18T18:31:44Z","modified":"2026-10-28T21:30:03.919123103Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"},{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-524"],"updated_at":"2026-11-02T15:46:44.927642Z"},{"id":"UBUNTU-CVE-2026-93748","description":"http-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unauthenticated attackers to retrieve cached responses belonging to other users. Attackers can request the same URL with a large max-stale value to obtain another user's Set-Cookie session credentials from shared-cache entries that were deliberately zeroed for security reasons.","status":"published","published":"2026-09-18T18:18:00Z","modified":"2026-10-17T13:01:18.294379982Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"},{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:57:44.071534Z"},{"id":"AZL-103448","title":"CVE-2026-93748 affecting package nodejs-nodemon 2.0.3-5","description":"http-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unauthenticated attackers to retrieve cached responses belonging to other users. Attackers can request the same URL with a large max-stale value to obtain another user's Set-Cookie session credentials from shared-cache entries that were deliberately zeroed for security reasons.","status":"published","published":"2026-09-18T18:18:33Z","modified":"2026-11-05T05:36:30Z","updated_at":"2026-11-05T16:41:17.528763Z"},{"id":"AZL-103485","title":"CVE-2026-93748 affecting package python-tensorboard 2.16.2-6","description":"http-cache-semantics through 4.2.0 fails to properly validate security-zeroed cache entries when processing client max-stale directives, allowing unauthenticated attackers to retrieve cached responses belonging to other users. Attackers can request the same URL with a large max-stale value to obtain another user's Set-Cookie session credentials from shared-cache entries that were deliberately zeroed for security reasons.","status":"published","published":"2026-09-18T18:18:33Z","modified":"2026-09-28T05:39:54Z","updated_at":"2026-11-02T15:28:00.794214Z"},{"id":"CLSA-2026-1792231034","title":"TuxCare security update for http-cache-semantics (1 CVE)","description":"TuxCare rebuilt http-cache-semantics to address 1 CVE. Fixed in 3.8.1-tuxcare.4.","status":"published","published":"2026-10-17T09:57:14Z","modified":"2026-10-30T19:46:04.748490982Z","updated_at":"2026-11-02T15:43:52.011757Z"},{"id":"CLSA-2026-1792743662","title":"TuxCare security update for http-cache-semantics (1 CVE)","description":"TuxCare rebuilt http-cache-semantics to address 1 CVE. Fixed in 4.2.0-tuxcare.1.","status":"published","published":"2026-10-23T08:21:02Z","modified":"2026-10-23T13:45:02.971964016Z","updated_at":"2026-11-02T15:43:54.981307Z"},{"id":"ROOT-APP-NPM-CVE-2026-93748","title":"CVE-2026-93748 in http-cache-semantics - Patched by Root","description":"Root has patched CVE-2026-93748 in the http-cache-semantics package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-10-14T09:55:37Z","modified":"2026-10-14T10:15:04.004722538Z","updated_at":"2026-11-02T15:53:27.649662Z"}]}}