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CVE-2026-3099 Detail

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.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://access.redhat.com/security/cve/CVE-2026-3099 Red Hat, Inc.
https://bugzilla.redhat.com/show_bug.cgi?id=2442232 Red Hat, Inc.
https://gitlab.gnome.org/GNOME/libsoup/-/issues/495 Red Hat, Inc.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-323 Reusing a Nonce, Key Pair in Encryption Red Hat, Inc.  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-3099
NVD Published Date:
03/12/2026
NVD Last Modified:
03/12/2026
Source:
Red Hat, Inc.