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CVE-2026-91920 - undertow: undertow: ChunkReader message length permits chunk-size overflow

undertow: undertow: ChunkReader message length permits chunk-size overflow
MEDIUM
Severity & confidence
Source severitymedium
Platform severitymedium
Confidencehigh
Exploitationunknown
CVSS6.5
Affected
VendorsRed Hat
Reporting sources (2)
Red Hat - CVE Feed
Open source โ†—
NIST NVD - National Vulnerability Database
Open source โ†—
Timeline & provenance
Published2026-10-29T12:11:57
Last updated2026-11-02T02:13:47
Ingested2026-10-30T00:31:47
FreshnessNEAR-REAL-TIME
Threat typevulnerability
Recommended action
Apply the Red Hat errata / RHSA referenced in the advisory.
Next steps
  1. Identify affected systems in your environment.
  2. Apply the vendor patch or mitigation guidance.
  3. Review logs for indicators described in the advisory.
  4. Follow the affected vendor/product to track updates.
Confidence explanation
Reported by a government or cert-grade source (CISA, NCSC, NVD, ENISA, MSRC).
Source type: vendor ยท Original: Red Hat - CVE Feed