What is CVE-2026-33007?

CVE-2026-33007 is a medium-severity vulnerability in Apache HTTP Server, classified under NULL Pointer Dereference. CVSS score: 5.3/10. Published 2026-05-04.

How severe is CVE-2026-33007?

Medium severity. CVSS v3 base score is 5.3 out of 10.

NULL pointer dereference in Apache HTTP Server

CVE-2026-33007

A NULL pointer dereference in the mod_authn_socache in Apache HTTP Server 2.4.66 and earlier allows an unauthenticated remote user to crash a child process in a caching forward proxy configuration. Users are recommended to upgrade to version 2.4.67, which fixes this issue.

Published 2026-05-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.012 (67.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.012 · change: +0.007

Affected products

Apache HTTP Server
Apache Software Foundation HTTP Server — versions 2.4.0

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

httpd.apache.org/security/vulnerabilities_24.html (vendor-advisory, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-33007?: CVE-2026-33007 is a medium-severity vulnerability in Apache HTTP Server, classified under NULL Pointer Dereference. CVSS score: 5.3/10. Published 2026-05-04.
How severe is CVE-2026-33007?: Medium severity. CVSS v3 base score is 5.3 out of 10.