High 7.5Published Jan 7, 2026

CVE-2025-13151CVE-2025-13151

Updated under an hour ago (Oct 26, 2026, 6:23 AM ET)

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It affects GnuTLS libtasn1 and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for GnuTLS libtasn1

Exploited in the last 30 days

Stack-based buffer overflow in libtasn1 version: v4.20.0. The function fails to validate the size of input data resulting in a buffer overflow in asn1_expend_octet_string.

CVSS: 7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-120, CWE-121
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: certcc
NVD analysis: Analyzed
Record last updated: Jan 20, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

GnuTLS libtasn1 gnutls:libtasn1 (from the name)	through 4.20.0	CNA record
gnu libtasn1 gnu:libtasn1	4.20.0	NVD

References

https://gitlab.com/gnutls/libtasn1product
https://gitlab.com/gnutls/libtasn1/-/merge_requests/121patch
http://www.openwall.com/lists/oss-security/2026/01/08/5mailing-list, patch
https://www.kb.cert.org/vuls/id/271649third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.