Dashboard / CVE-2026-3099

CVE-2026-3099

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 52/100
Published: 2026-03-12 Modified: 2026-11-05 First seen: 2026-11-05 Status: active

Attack Surface

Network No Auth Scope Change

CVSS Vector Breakdown

AV: Network
AC: High
PR: None
UI: Required
S: Changed
C: Low
I: Low
A: Low

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.

Weakness Classification (1)

Affected Software (6)

VendorProductVersion
gnome libsoup -
redhat enterprise_linux 6.0
redhat enterprise_linux 7.0
redhat enterprise_linux 8.0
redhat enterprise_linux 9.0
redhat enterprise_linux 10.0

References & Advisories (3)

https://bugzilla.redhat.com/show_bug.cgi?id=2442232
Issue Tracking Third Party Advisory
https://gitlab.gnome.org/GNOME/libsoup/-/issues/495
Exploit Issue Tracking Third Party Advisory

Bug Bounty Relevance

52 / 100
✓ Network accessible
✓ No authentication

CVSS Score

5.8 / 10.0 v3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L

EPSS — Exploitation Probability

0.42%
Raw Score 0.004180
Percentile 36.6%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00418
2026-11-12
0.00418
2026-11-10
0.00418
2026-11-09
0.00418
2026-11-08
0.00418
2026-11-07
0.00418
2026-11-06
0.00369
2026-11-05
0.00369

Intelligence Sources

mitre ref →
nvd ref →

External Links