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CVE-2026-73636 is an authentication-bypass vulnerability in Apache HTTP Server's mod_auth_digest module affecting versions 2.4.0 through 2.4.68 on all platforms. When AuthDigestNonceLifetime is set to 0, a man-in-the-middle attacker can send crafted requests that trigger garbage collection of a client's shared-memory entry, allowing captured Digest authentication credentials to be replayed and defeating nonce-based replay protection. Apache HTTP Server 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.
An authentication bypass by capture-replay 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 credential-replay vulnerability in Apache mod_auth_digest.
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.