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CVE-2021-26690 is a NULL pointer dereference in the Apache HTTP Server mod_session cookie-header parser. In affected Apache HTTP Server releases, a specially crafted Cookie header can cause mod_session to dereference a NULL pointer while processing session data. The issue affects versions 2.4.0 through 2.4.46; vendor tracking also characterizes versions before 2.4.48 as vulnerable, reflecting upstream release and backport handling.
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No valid public exploits. Mallory filtered out 2 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability referenced by the CentOS 7 TuxCare security advisory; the content does not describe its technical impact.
A NULL-pointer dereference vulnerability when Apache HTTP Server mod_session parses a Cookie header.
A NULL-pointer dereference vulnerability when Apache HTTP Server mod_session parses a Cookie header.
A NULL-pointer dereference vulnerability in Apache HTTP Server's mod_session while parsing a Cookie header; it is addressed by the Red Hat httpd update.
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.