What is CVE-2026-3099?

CVE-2026-3099 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Reusing a Nonce, Key Pair in Encryption. CVSS score: 5.8/10. Published 2026-03-12.

How severe is CVE-2026-3099?

Medium severity. CVSS v3 base score is 5.8 out of 10.

Vulnerability in Red Hat Enterprise Linux 10

CVE-2026-3099

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 a…

EPSS: 0.005 (64.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L.

Affected products

Weakness classification (CWE)

CWE-323 — Reusing a Nonce, Key Pair in Encryption

References

access.redhat.com/security/cve/CVE-2026-3099 (vdb-entry, x_refsource_REDHAT)
RHBZ#2442232 (issue-tracking, x_refsource_REDHAT)
gitlab.gnome.org/GNOME/libsoup/-/issues/495

Frequently asked questions

What is CVE-2026-3099?: CVE-2026-3099 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Reusing a Nonce, Key Pair in Encryption. CVSS score: 5.8/10. Published 2026-03-12.
How severe is CVE-2026-3099?: Medium severity. CVSS v3 base score is 5.8 out of 10.