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CVE-2026-57941 is a use-after-free vulnerability in Apache HTTP Server's mod_http2 module affecting versions 2.4.0 through 2.4.68. Re-entrancy involving the shared session->bbtmp buffer can cause access to freed memory followed by an out-of-bounds or wild write under constrained stream-multiplexing and buffer-lifecycle conditions. The resulting memory corruption may cause denial of service or potentially code execution, depending on deployment and exploitability conditions. Apache HTTP Server 2.4.69 fixes the vulnerability.
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A use-after-free 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 moderate-severity use-after-free vulnerability in Apache HTTP Server's mod_http2 module that can cause memory corruption through a write to freed memory. The article identifies Apache HTTP Server 2.4.69 as containing the fix.
A memory-safety vulnerability in Apache mod_http2 involving a use-after-free and out-of-bounds write, with potential for more than a crash under suitable conditions.
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.