{"id":"CVE-2025-9901","aliases":["AZL-67058","AZL-67061","DEBIAN-CVE-2025-9901","EUVD-2025-26502","GHSA-hxjp-2xf5-wmrj","UBUNTU-CVE-2025-9901"],"status":"published","title":"Libsoup: improper handling of http vary header in libsoup caching","description":"A flaw was found in libsoup’s caching mechanism, SoupCache, where the HTTP Vary header is ignored when evaluating cached responses. This header ensures that responses vary appropriately based on request headers such as language or authentication. Without this check, cached content can be incorrectly reused across different requests, potentially exposing sensitive user information. While the issue is unlikely to affect everyday desktop use, it could result in confidentiality breaches in proxy or multi-user environments.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00472,"percentile":0.41063,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-524"],"published":"2025-09-03T12:32:27Z","modified":"2026-11-10T02:50:33Z","affected":[{"source":"osv","ecosystem":"Azure Linux:3","package":"libsoup","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"3.4.4-18"}]}]},{"source":"osv","ecosystem":"Azure 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hat","product":"red hat enterprise linux 10"},{"vendor":"red hat","product":"red hat enterprise linux 6"},{"vendor":"red hat","product":"red hat enterprise linux 7"},{"vendor":"red hat","product":"red hat enterprise linux 8"},{"vendor":"red hat","product":"red hat enterprise linux 9"}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2025-9901","tags":["vdb-entry","x_refsource_REDHAT","web","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2392790","tags":["issue-tracking","x_refsource_REDHAT","report"]},{"url":"https://gitlab.gnome.org/GNOME/libsoup/-/issues/453"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-9901","tags":["web"]},{"url":"https://github.com/advisories/GHSA-hxjp-2xf5-wmrj"},{"url":"https://security-tracker.debian.org/tracker/CVE-2025-9901","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2025-9901","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-9901","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2025-9901","title":"Libsoup: improper handling of http vary header in libsoup caching","description":"A flaw was found in libsoup’s caching mechanism, SoupCache, where the HTTP Vary header is ignored when evaluating cached responses. This header ensures that responses vary appropriately based on request headers such as language or authentication. Without this check, cached content can be incorrectly reused across different requests, potentially exposing sensitive user information. While the issue is unlikely to affect everyday desktop use, it could result in confidentiality breaches in proxy or multi-user environments.","status":"published","published":"2025-09-03T12:32:27.414Z","modified":"2026-11-05T16:09:15.187Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-524"],"updated_at":"2026-11-05T17:53:58.265681Z"}],"euvd":[{"id":"EUVD-2025-26502","description":"A flaw was found in libsoup’s caching mechanism, SoupCache, where the HTTP Vary header is ignored when evaluating cached responses. This header ensures that responses vary appropriately based on request headers such as language or authentication. Without this check, cached content can be incorrectly reused across different requests, potentially exposing sensitive user information. While the issue is unlikely to affect everyday desktop use, it could result in confidentiality breaches in proxy or multi-user environments.","status":"published","published":"2025-09-03T12:32:27Z","modified":"2026-11-05T16:09:15Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-05T18:00:58.377138Z"}],"ghsa":[{"id":"GHSA-hxjp-2xf5-wmrj","title":"A flaw was found in libsoup’s caching mechanism, SoupCache, where the HTTP Vary header is ignored...","description":"A flaw was found in libsoup’s caching mechanism, SoupCache, where the HTTP Vary header is ignored when evaluating cached responses. This header ensures that responses vary appropriately based on request headers such as language or authentication. Without this check, cached content can be incorrectly reused across different requests, potentially exposing sensitive user information. While the issue is unlikely to affect everyday desktop use, it could result in confidentiality breaches in proxy or multi-user environments.","status":"published","published":"2025-09-03T15:30:33Z","modified":"2026-05-06T18:30:24Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-524"],"updated_at":"2026-11-02T15:07:55.247215Z"}],"nvd":[{"id":"CVE-2025-9901","description":"A flaw was found in libsoup’s caching mechanism, SoupCache, where the HTTP Vary header is ignored when evaluating cached responses. This header ensures that responses vary appropriately based on request headers such as language or authentication. Without this check, cached content can be incorrectly reused across different requests, potentially exposing sensitive user information. While the issue is unlikely to affect everyday desktop use, it could result in confidentiality breaches in proxy or multi-user environments.","status":"published","published":"2025-09-03T13:15:50.133Z","modified":"2026-11-05T17:17:21.023Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-524"],"updated_at":"2026-11-05T19:55:50.758755Z"}],"osv":[{"id":"CVE-2025-9901","description":"A flaw was found in libsoup’s caching mechanism, SoupCache, where the HTTP Vary header is ignored when evaluating cached responses. This header ensures that responses vary appropriately based on request headers such as language or authentication. Without this check, cached content can be incorrectly reused across different requests, potentially exposing sensitive user information. While the issue is unlikely to affect everyday desktop use, it could result in confidentiality breaches in proxy or multi-user environments.","status":"published","published":"2025-09-03T13:15:50Z","modified":"2026-04-10T05:36:49.141036Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:53.490346Z"},{"id":"DEBIAN-CVE-2025-9901","description":"A flaw was found in libsoup’s caching mechanism, SoupCache, where the HTTP Vary header is ignored when evaluating cached responses. This header ensures that responses vary appropriately based on request headers such as language or authentication. Without this check, cached content can be incorrectly reused across different requests, potentially exposing sensitive user information. While the issue is unlikely to affect everyday desktop use, it could result in confidentiality breaches in proxy or multi-user environments.","status":"published","published":"2025-09-03T13:15:50.133Z","modified":"2026-10-31T16:04:23.122203964Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:48.440897Z"},{"id":"UBUNTU-CVE-2025-9901","description":"A flaw was found in libsoup’s caching mechanism, SoupCache, where the HTTP Vary header is ignored when evaluating cached responses. This header ensures that responses vary appropriately based on request headers such as language or authentication. Without this check, cached content can be incorrectly reused across different requests, potentially exposing sensitive user information. While the issue is unlikely to affect everyday desktop use, it could result in confidentiality breaches in proxy or multi-user environments.","status":"published","published":"2025-09-03T13:15:00Z","modified":"2026-11-10T02:50:33.455613579Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-10T03:18:56.552317Z"},{"id":"AZL-67058","title":"CVE-2025-9901 affecting package libsoup 3.4.4-18","description":"A flaw was found in libsoup’s caching mechanism, SoupCache, where the HTTP Vary header is ignored when evaluating cached responses. This header ensures that responses vary appropriately based on request headers such as language or authentication. Without this check, cached content can be incorrectly reused across different requests, potentially exposing sensitive user information. While the issue is unlikely to affect everyday desktop use, it could result in confidentiality breaches in proxy or multi-user environments.","status":"published","published":"2025-09-03T13:15:50Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:23.841127Z"},{"id":"AZL-67061","title":"CVE-2025-9901 affecting package libsoup 3.0.4-12","description":"A flaw was found in libsoup’s caching mechanism, SoupCache, where the HTTP Vary header is ignored when evaluating cached responses. This header ensures that responses vary appropriately based on request headers such as language or authentication. Without this check, cached content can be incorrectly reused across different requests, potentially exposing sensitive user information. While the issue is unlikely to affect everyday desktop use, it could result in confidentiality breaches in proxy or multi-user environments.","status":"published","published":"2025-09-03T13:15:50Z","modified":"2026-04-21T04:38:03.694377Z","updated_at":"2026-11-02T15:28:08.354547Z"}]}}