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CVE-2023-25577 is an uncontrolled resource-consumption vulnerability in Werkzeug versions earlier than 2.2.3. The multipart form-data parser accepted an unlimited number of parts, including file parts. Although individual parts may be very small, parsing each incurs CPU overhead and can allocate Python objects; file parts can additionally consume memory and file descriptors. A crafted multipart request directed to an application endpoint that accesses parsed request content can therefore cause excessive resource use and denial of service.
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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.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Python Werkzeug resource-exhaustion vulnerability triggered by multipart form data containing many fields.
Unknown
A Werkzeug multipart form-data parsing flaw that can cause high resource usage when processing requests containing many fields.
Unknown.
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.