CVE-2026-63686

High

Description

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.

SeverityHigh

CVSS7.5

Exploit probability—

Product

Apache Http Server

PublishedOct 1, 2026

First seenOct 1, 2026

Weakness typeCWE-476NULL pointer dereference

How to fix

Update

apache http_server2.4.69 or later

Vendor advisories

httpd.apache.org/security/vulnerabilities_24.html

Affected products

Product	Affected versions	Fixed in
apache http_server	2.4.0 ≤ v < 2.4.69	2.4.69

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