Reusing a Nonce Affecting libsoup3 package, versions *


Severity

Recommended
low

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.36% (28th percentile)

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  • Snyk IDSNYK-UBUNTU2204-LIBSOUP3-15356240
  • published12 Mar 2026
  • disclosed12 Mar 2026

Introduced: 12 Mar 2026

CVE-2026-3099  (opens in a new tab)
CWE-323  (opens in a new tab)

How to fix?

There is no fixed version for Ubuntu:22.04 libsoup3.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libsoup3 package and not the libsoup3 package as distributed by Ubuntu. See How to fix? for Ubuntu:22.04 relevant fixed versions and status.

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 Base Scores

version 3.1