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CVE-2026-63382 is an HTTP request-smuggling vulnerability in Libevent's evhttp parser. Affected versions inconsistently parse duplicate Transfer-Encoding headers, comma-separated Transfer-Encoding values, and chunked-message framing terminated with bare line feeds. Header lookup can select only the first duplicate Transfer-Encoding field; prior logic fails to recognize valid Transfer-Encoding lists ending in chunked; and chunk parsing accepts non-strict line endings. These parsing discrepancies can cause Libevent and an upstream or downstream HTTP proxy to assign different request boundaries.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
34 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability addressed by the Miracle Linux AXSA-2026-1863 update for libevent packages; the content provides no technical flaw description.
A vulnerability addressed by the Alma Linux 10 libevent security advisory. The content does not provide vulnerability-specific technical details.
A vulnerability addressed by the Oracle Linux 10 libevent package advisory; no technical flaw details are provided.
Multiple HTTP parser vulnerabilities in Libevent evhttp that enable HTTP request smuggling.
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.