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CVE-2026-63686 is a NULL pointer dereference in Apache HTTP Server's mod_xml2enc module, affecting versions 2.4.0 through 2.4.68 on all platforms. An untrusted backend server can trigger the flaw by returning a proxied response whose character-set conversion partially succeeds and then fails. Processing this response can crash Apache HTTP Server and cause denial of service. Version 2.4.69 fixes the vulnerability.
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No public exploit code observed for this vulnerability.
13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A NULL pointer dereference vulnerability in Apache HTTP Server. The advisory lists versions 2.4.0 through versions before 2.4.69 as affected and recommends upgrading to 2.4.69 or later.
Unknown
A denial-of-service null-pointer dereference in Apache mod_xml2enc during proxy character-set conversion.
Listed as an Apache HTTP Server vulnerability covered by the Nessus plugin. Flaw-specific technical details are not provided.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.