HIGHRubyGems →
Rack's multipart header parsing allows Denial of Service via escape-heavy quoted parameters
Rack's multipart header parsing allows Denial of Service via escape-heavy quoted parameters
Affected packages
- rack— 3.0.0.beta1 → 3.1.21
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-v6x5-cg8r-vv6x
- https://nvd.nist.gov/vuln/detail/CVE-2026-34827
- https://github.com/rack/rack
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2026-34827.yml
Structured record: https://osv.dev/vulnerability/GHSA-v6x5-cg8r-vv6x
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