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Rack's multipart parsing without Content-Length header allows unbounded chunked file uploads
Rack's multipart parsing without Content-Length header allows unbounded chunked file uploads
Affected packages
- rack— before 2.2.23
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- —
- EPSS percentile
- —
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.
Sources
- https://github.com/rack/rack/security/advisories/GHSA-8vqr-qjwx-82mw
- https://nvd.nist.gov/vuln/detail/CVE-2026-34829
- https://github.com/rack/rack
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2026-34829.yml
Structured record: https://osv.dev/vulnerability/GHSA-8vqr-qjwx-82mw
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