🛡️ CVE-2026-3099
🟡 CVSS 5.8 — Medium ⚠️ Exploit Public CWE-323 NVD
5.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

A flaw was found in Libsoup. The server-side digest authentication implementation in the SoupAuthDomainDigest class does not properly track issued nonces or enforce the required incrementing nonce-count (nc) attribute. This vulnerability allows a remote attacker to capture a single valid authentication header and replay it repeatedly. Consequently, the attacker can bypass authentication and gain unauthorized access to protected resources, impersonating the legitimate user.

Details

Severity MEDIUM
CVSS Score 5.8
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L
CWE CWE-323
Public Exploit ⚠️ Yes
Source NVD
Published 2026-03-12
Updated 2026-06-02
Modified 2026-03-23
Fix URL N/A

Affected Packages

Software From version Fixed in
enterprise-linux — —
libsoup — —

References

Issue Tracking, Third Party Advisory https://bugzilla.redhat.com/show_bug.cgi?id=2442232
Exploit, Issue Tracking, Third Party Advisory https://gitlab.gnome.org/GNOME/libsoup/-/issues/495

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