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 vers…

EPSS: 0.006 (69.3th percentile) — read the EPSS interpretation.

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.

Affected products

Apache Http_server
Apache Software Foundation Http Server — versions 2.4.0

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

security@apache.org (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.