CVE-2026-12547

Description

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 previous proxy are sent to the new proxy, leaking credentials.

CVSS Vector

References

• https://access.redhat.com/security/cve/CVE-2026-12547
• https://bugzilla.redhat.com/show_bug.cgi?id=2489994
• https://gitlab.gnome.org/GNOME/libsoup/-/work_items/506