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.
Exploitability
AV:NAC:LPR:HUI:RScope
S:CImpact
C:LI:NA:N3.4/CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:N/A:NOther