CVE-2009-5138
MEDIUM · CVSS 5.8EPSS 1.8%EU EUVD
GnuTLS before 2.7.6, when the GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT flag is not enabled, treats version 1 X.509 certificates as intermediate CAs, which allows remote attackers to bypass intended restrictions by leveraging a X.509 V1 certificate from a trusted CA to issue new certificates, a different vulnerability than CVE-2014-1959.
Key facts
- CVSS score
- 5.8 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:N- Weakness (CWE)
- CWE-264
- EPSS score
- 1.8% (79th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-5093)
- Published
- March 7, 2014
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-5093 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
References
- http://article.gmane.org/gmane.comp.security.oss.general/12223
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00000.html
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00001.html
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00003.html
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00020.html
- http://rhn.redhat.com/errata/RHSA-2014-0247.html
- http://secunia.com/advisories/57254
- http://secunia.com/advisories/57260
- http://secunia.com/advisories/57274
- http://secunia.com/advisories/57321
- http://thread.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3351/focus=3361
- http://thread.gmane.org/gmane.comp.security.oss.general/12127
- https://bugzilla.redhat.com/show_bug.cgi?id=1069301
- https://gitorious.org/gnutls/gnutls/commit/c8dcbedd1fdc312f5b1a70fcfbc1afe235d800cd(Exploit, Patch)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
Query CVEs from your AI assistant
The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.
Add the CVE brain