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CVE-2026-44631 is a buffer underwrite vulnerability in Apache HTTP Server versions 2.4.0 through 2.4.67, triggered by crafted regular expressions in the server configuration. Incorrect handling of these expressions can corrupt memory, cause denial of service, and potentially permit arbitrary code execution. The specific vulnerable function is not identified. Apache HTTP Server 2.4.68 fixes the issue.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
44 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A buffer underwrite vulnerability involving crafted regular expressions in Apache HTTP Server configuration, affecting versions 2.4.0 through 2.4.67. The advisory assigns a critical CVSS v3 base score of 9.8. Apache HTTP Server 2.4.68 fixes the issue; the Echo package advisory recommends apache2 version 2.4.67-1~deb11u3 or later.
An important, network-reachable vulnerability referenced by an AlmaLinux 9.6 TuxCare local security-check plugin. The listed CVSS v3 vector indicates low-complexity, unauthenticated remote exploitation with no user interaction and high confidentiality, integrity, and availability impact. No known exploit is available according to the content.
An important, network-reachable vulnerability referenced in the TuxCare CentOS 8.4 advisory. The supplied CVSS v3 vector indicates low-complexity, unauthenticated exploitation with no user interaction and high confidentiality, integrity, and availability impact.
A critical network-reachable vulnerability affecting Apache HTTP Server-related packages on Huawei EulerOS UVP 2.10.1. The supplied CVSS v3 vector indicates no privileges or user interaction are required and high confidentiality, integrity, and availability impact.
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.