CVE-2026-3099

HIGH EPSS 27.4%
Published Mar 12, 20263mo ago · Modified Jun 17, 20261w ago
7.3 CVSS 3.1
High
Find Similar
Published Mar 12, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
7.3
Exploitability
3.9
Impact
3.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability Low

Threat Intelligence

EPSS Exploit Probability
27.4% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-323

Affected Products 6

VendorProductVersionRange
gnomelibsoup*any
redhatenterprise_linux6.0any
redhatenterprise_linux7.0any
redhatenterprise_linux8.0any
redhatenterprise_linux9.0any
redhatenterprise_linux10.0any

References 3

  • access.redhat.com https://access.redhat.com/security/cve/CVE-2026-3099
    Third Party Advisory
  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2442232
    Issue TrackingThird Party Advisory
  • gitlab.gnome.org https://gitlab.gnome.org/GNOME/libsoup/-/issues/495
    ExploitIssue TrackingThird Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.