[UPDATE] [high] GnuTLS: Multiple vulnerabilities

CSIRTS triage

What

Multiple vulnerabilities can bypass security measures, disclose confidential information, or cause denial of service.

Who is affected

Users of GnuTLS in their applications.

Urgency

Remediation is urgent due to the high severity of the vulnerabilities.

Action

Update to the latest version of GnuTLS.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source

CERT-Bund (BSI) Security Advisories (DE · national-cert · site)

Severity

high

Published

2026-07-10

Exploitation

Not in CISA KEV at last sync

Language

Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1312

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

• Low exploitation riskCVE-2026-338450.80% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 52% of all scored CVEs.
• Moderate exploitation riskCVE-2026-338461.3% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 66% of all scored CVEs.
• Low exploitation riskCVE-2026-38320.72% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 50% of all scored CVEs.
• Low exploitation riskCVE-2026-38330.57% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 43% of all scored CVEs.
• Moderate exploitation riskCVE-2026-420091.3% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 68% of all scored CVEs.
• Moderate exploitation riskCVE-2026-420101.1% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 60% of all scored CVEs.
• Low exploitation riskCVE-2026-420110.47% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all scored CVEs.
• Low exploitation riskCVE-2026-420120.35% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all scored CVEs.
• Low exploitation riskCVE-2026-420130.42% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 34% of all scored CVEs.
• Low exploitation riskCVE-2026-420140.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all scored CVEs.

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• unknownUSN-8502-1: GnuTLS vulnerabilitiesubuntu
• mediumCVE-2026-42014: Gnutls: fix use-after-free in gnutls_pkcs11_token_set_pinmsrc
• lowCVE-2026-5419: Guntls: gnutls: information disclosure via timing side-channel in pkcs#7 padding removalmsrc

Recent advisories for GnuTLS

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

• medium[UPDATE] [medium] GnuTLS: Multiple vulnerabilities allow Denial of Servicecert-bund · 2026-07-10
• medium[UPDATE] [medium] GnuTLS: Multiple vulnerabilitiescert-bund · 2026-07-07
• medium[UPDATE] [medium] GnuTLS: Vulnerability allows denial of servicecert-bund · 2026-07-07
• low[UPDATE] [low] GnuTLS: Vulnerability allows unspecified attackcert-bund · 2026-07-07
• unknownUSN-8502-1: GnuTLS vulnerabilitiesubuntu · 2026-07-06
• lowCVE-2026-5419: Guntls: gnutls: information disclosure via timing side-channel in pkcs#7 padding removalmsrc · 2026-06-09

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