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CVE-2026-104269 is a multipart filename security-rule bypass in ModSecurity. An RFC 2231 filename* parameter allows remote, unauthenticated attackers to bypass rules governing multipart filenames. Amazon Linux identifies mod_security as affected and pending a fix on Amazon Linux 2, 2023, and 2027 Preview, while httpd is not affected. Precise vulnerable package versions and the underlying implementation defect are not established.
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No public exploit code observed for this vulnerability.
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2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A ModSecurity multipart filename-rule bypass involving the RFC 2231 filename* parameter. The advisory rates it Important with a CVSS v3.1 score of 8.6. Its vector indicates network exploitation with low complexity, no privileges or user interaction required, changed scope, and high integrity impact. Fixes remain pending for the listed Amazon Linux mod_security packages; httpd is explicitly not affected.
An unpatched vulnerability affecting the modsecurity and modsecurity-apache packages listed for Ubuntu and Debian. The supplied CVSS v3 vector indicates network-based exploitation with low complexity, no privileges or user interaction required, and high integrity and availability impacts. The underlying flaw is not described.
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.