What is CVE-2026-33307?

CVE-2026-33307 is a high-severity vulnerability in Airtower-luna Mod_gnutls, classified under Stack-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-03-24.

How severe is CVE-2026-33307?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Airtower-luna Mod_gnutls

CVE-2026-33307

Mod_gnutls is a TLS module for Apache HTTPD based on GnuTLS. In versions prior to 0.12.3 and 0.13.0, code for client certificate verification imported the certificate chain sent by the client into a fixed size `gnutls_x509_crt_t x509[]` ar…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (15.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Airtower-luna Mod_gnutls — versions < 0.12.3

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

https://github.com/airtower-luna/mod_gnutls/security/advisories/GHSA-gjpm-55p4-c76r (x_refsource_CONFIRM)
https://github.com/airtower-luna/mod_gnutls/commit/bf4f08c49acae528e97885082cdee460f4534dc1 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-33307?: CVE-2026-33307 is a high-severity vulnerability in Airtower-luna Mod_gnutls, classified under Stack-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-03-24.
How severe is CVE-2026-33307?: High severity. CVSS v3 base score is 7.5 out of 10.