# CVE-2026-95210: CVE-2026-95210

Status: published. Published: 2026-10-08. Updated: 2026-11-04.

GnuTLS v3.8.13 does not reject a critical keyUsage extension when it cannot be processed, such as when extnValue is an ASN.1 NULL (05 00) instead of a BIT STRING. NOTE: the Supplier does not consider this an actionable security vulnerability because of its "threat model doesn't consider attacks only possible by modifying anything within the trust boundary (private keys, trusted certificate authorities and their issued certificates including intermediate CAs, etc.)" policy.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- n/a / n/a: Version not specified (affected). Source: CNA: mitre

## Severity and prioritization

- CVSS 3.1: 4.8 (medium); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N; source: ADP: CISA-ADP

- CVSS 3.1: 4.8 (medium); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N; source: NVD: 134c704f-9b21-4f2e-91b3-4a467353bcc0

- CISA KEV: No listing in collected sources

- EPSS: 0.16% as of 2026-11-03; percentile 4.80%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-295

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- http://gnutls.com/ (CNA: mitre)

- https://gist.github.com/lkloliver/4aad23689202720c4068f43b3c6069c7 (CNA: mitre)

- https://gitlab.com/gnutls/gnutls/-/work_items/1965 (CNA: mitre)

- https://gitlab.com/gnutls/gnutls/-/blob/e2169a87c7fb91935c2845088204b102baed4c5f/SECURITY.md (CNA: mitre)

- https://github.com/lkloliver/poc/tree/main/CVE-2026-95210 (ADP: CVE)

- http://gnutls.com/ (cve@mitre.org)

- https://gist.github.com/lkloliver/4aad23689202720c4068f43b3c6069c7 (cve@mitre.org)

- https://gitlab.com/gnutls/gnutls/-/blob/e2169a87c7fb91935c2845088204b102baed4c5f/SECURITY.md (cve@mitre.org)

- https://gitlab.com/gnutls/gnutls/-/work_items/1965 (cve@mitre.org)

- https://github.com/lkloliver/poc/tree/main/CVE-2026-95210 (af854a3a-2127-422b-91ae-364da2661108)

## Provenance

- CNA: mitre: https://www.cve.org/CVERecord?id=CVE-2026-95210; retrieved 2026-11-04; source updated 2026-11-04

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-95210; retrieved 2026-11-04; source updated 2026-11-04

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-95210; retrieved 2026-11-04; source updated Not reported

Revision: 9f42584a3b8e087dec1af18c70c22962ef52665a204af0e01ba708b904fb65fd

Canonical: https://y2.dev/cve/CVE-2026-95210

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- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

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