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Message-ID: <f7edd111-67d6-7351-8522-fd25eaebdc7c@apache.org>
Date: Thu, 01 Oct 2026 18:09:49 +0000
From: Eric Covener <covener@...che.org>
To: oss-security@...ts.openwall.com
Subject: CVE-2026-63686: Apache HTTP Server: mod_xml2enc crash on charset
conversion failure
Severity: low
Affected versions:
- Apache HTTP Server 2.4.0 through 2.4.68
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.
Credit:
Lucian Nitescu (finder)
Zhen Kong (finder)
References:
https://httpd.apache.org/security/vulnerabilities_24.html
https://httpd.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-63686
Timeline:
2026-06-14: Report received
2026-10-01: fixed in 2.4.x by r1938678
2026-10-01: 2.4.69 released
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