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CVE-2026-12547lowCWE-201

Libsoup: information disclosure in libsoup via soupauthmanager proxy credential leak on proxy switch

8Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 3.4epss 0.2%
exploitation probability
0.2%top 86% of all CVEs
observed exploitation
nono source reports it
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:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:N/A:N