🛡️ CVE-2026-12547

🟢 CVSS 3.4 — Low ✅ No Known Exploit CWE-201 NVD
3.4
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs administrative privileges on the target. A user must be tricked into taking some action. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality low, integrity none, availability none.

Weakness class

CVE-2026-12547 is classified as CWE-201: Insertion of Sensitive Information Into Sent Data. The code transmits data to another actor, but a portion of the data includes sensitive information that should not be accessible to that actor.

Affected software

CVE-2026-12547 is recorded against 1 package.

  • unknown

Timeline and source

Published on 21 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

access.redhat.com
bugzilla.redhat.com
gitlab.gnome.org

Details

Severity LOW
CVSS Score 3.4
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:N/A:N
CWE CWE-201
Public Exploit ✅ No
Source NVD
Published 2026-07-21
Updated 2026-08-11
Modified 2026-07-21
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown — —

Similar Threats

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