CVE-2026-3099
Libsoup: libsoup: authentication bypass via digest authentication replay attack
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.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:HAttack ComplexityHigh
PR:NPrivileges RequiredNone
UI:RUser InteractionRequired
Scope
S:CScopeChanged
Impact
C:LConfidentialityLow
I:LIntegrityLow
A:LAvailabilityLow
Weaknesses
Affected Products
Red Hat Inc.
commercial·USaka Red Hat, redhat
gnome
oss-project·USaka glib, gnome project
GNOME Foundation
oss-project·USaka libsoup, gvfs, gnu image manipulation program (gimp)
and 6 more affected products View all →
Exploitability
Official Patch Available
Workaround Available
References
https://access.redhat.com/security/cve/CVE-2026-3099
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2442232
bugzilla.redhat.com
https://gitlab.gnome.org/GNOME/libsoup/-/issues/495
gitlab.gnome.org
and 2 more references View all →
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