CVE-2026-3099
highA flaw was found in Libsoup.
Vendor / product: Gnome — libsoup
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.
CVSS
7.3
7.3 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-03-12 14:16
Modified: 2026-11-05 20:17
NVD status: Analyzed
Last synced 2 hours ago
Verified against the source API 2026-11-05 20:22 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
gnome / libsoup all versions
redhat / enterprise_linux 6.0, 7.0, 8.0, 9.0, 10.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://access.redhat.com/security/cve/CVE-2026-3099 secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2442232 secalert@redhat.com
- https://gitlab.gnome.org/GNOME/libsoup/-/issues/495 secalert@redhat.com
Data sources
NVD CVE API 2.0 — fetched 2026-11-05 20:22 UTC · record ↗