What’s Vulnerable › Vulnerabilities

CVE-2026-12547: Libsoup: information disclosure in libsoup via soupauthmanager proxy credential leak on proxy switch

• Severity: low (CVSS 3.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-21 · updated 2026-10-24
• Weakness: CWE-201

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.

Affected products

• Red Hat Enterprise Linux 10: all versions

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

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