CVE-2026-63686CWE-476

CVE-2026-63686

High · published October 1, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
40.3
In the wild
Unconfirmed
What it is

A NULL pointer dereference in mod_xml2enc in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an untrusted backend server to cause a denial of service via a proxied response with a charset whose conversion partially succeeds then fails.

Users are recommended to upgrade to version 2.4.69, which fixes this issue.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00478 · 40.3th percentile
Weakness
CWE-476 · NULL Pointer Dereference
Published
2026-10-01T21:17Z
Affected products (1)
ProductVersionsFixed in
apache/http_server≥ 2.4.0, < 2.4.692.4.69
References (2)
https://httpd.apache.org/security/vulnerabilities_24.html · [email protected]http://www.openwall.com/lists/oss-security/2026/10/01/25 · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 03 OCT 03:45Z
    EPSS moved — → 0%
    epss
  • 01 OCT 16:20Z
    Apache HTTP Server: mod_xml2enc crash on charset conversion failure
    cvelistv5