CVE-2026-63686

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://httpd.apache.org/security/vulnerabilities_24.html	Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/10/01/25	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

History

05 Oct 2026, 17:46

Type	Values Removed	Values Added
First Time		Apache Apache http Server
References	~~() https://httpd.apache.org/security/vulnerabilities_24.html -~~	() https://httpd.apache.org/security/vulnerabilities_24.html - Vendor Advisory
References	~~() http://www.openwall.com/lists/oss-security/2026/10/01/25 -~~	() http://www.openwall.com/lists/oss-security/2026/10/01/25 - Mailing List, Third Party Advisory
CPE		cpe:2.3:a:apache:http_server::::::::

01 Oct 2026, 21:17

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/10/01/25 -

01 Oct 2026, 20:17

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5

01 Oct 2026, 17:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-01 17:17

Updated : 2026-10-05 17:46

NVD link : CVE-2026-63686

Mitre link : CVE-2026-63686

CVE.ORG link : CVE-2026-63686

JSON object : View

Products Affected

apache

http_server

CWE

CWE-476

NULL Pointer Dereference

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