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CVE-2026-66730 is a denial-of-service vulnerability in facil.io versions 0.6.0 through 0.7.6 affecting multipart/form-data body parsing. The flaw is caused by a missing progress guard in the HTTP body parsing loop: under malformed multipart input containing a partial closing boundary, the MIME parser can return 0 bytes consumed while setting neither completion nor error state. The caller then repeatedly invokes the parser against the same buffer region, creating an infinite loop. This traps the affected worker process at sustained 100% CPU utilization. Because the worker remains alive rather than crashing, it is not automatically respawned, allowing repeated requests to exhaust the worker pool and render the service unavailable until manually restarted.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.