CVE-2026-3099 — Libsoup: libsoup: authentication bypass via digest authentication replay attack
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…
Published: 2026-03-12 · CVSS: 5.8 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7