{"id":"CVE-2026-12547","title":"Libsoup: information disclosure in libsoup via soupauthmanager proxy credential leak on proxy switch","summary":"SoupAuthManager caches proxy authentication credentials without scoping them to the proxy authority (host:port). When the proxy configuration changes (e.g., via system settings or WPAD), cached Proxy-Authorization headers from the previo…","severity":"low","cvss":3.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:N/A:N","cvssSource":"cna","cwe":["CWE-201"],"vendor":"Red Hat","product":"libsoup3","affected":["libsoup3 (all versions)"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-07-21T19:02:39.410894Z"},"published":"2026-07-21","updated":"2026-11-06","sourceUpdated":"2026-11-06T17:57:54.406Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-12547","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-12547"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2489994","label":"RHBZ#2489994"},{"url":"https://gitlab.gnome.org/GNOME/libsoup/-/work_items/506"}],"tags":["cve.org"],"epss":0.00228,"epssPercentile":0.1359,"ingestedAt":"2026-11-06T19:01:36.646Z","slug":"CVE-2026-12547","body":"## Overview\n\nSoupAuthManager caches proxy authentication credentials without scoping them to the proxy authority (host:port). When the proxy configuration changes (e.g., via system settings or WPAD), cached Proxy-Authorization headers from the previous proxy are sent to the new proxy, leaking credentials.\n\n## Affected\n\n- `libsoup3 (all versions)`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n### Workarounds\n\nIf changing desktop proxy settings, close any applications using libsoup, then restart the application after the setting has been changed.","depth":"sunlit","depthScore":19,"depthScoreParts":{"impact":18.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}