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CVE-2026-91920: Red Hat: A flaw was found in the ChunkReader component of the Undertow web server, which is used to handle chunked transfer…

🗓️ 30 Oct 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com👁 3 Views

ChunkReader in Undertow web server allows request smuggling via chunk size overflow.

Related
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-91920
30 Oct 202601:24
–circl
cve
CVE
CVE-2026-91920
30 Oct 202601:16
–cve
cvelist
Cvelist
CVE-2026-91920 Undertow: undertow: chunkreader message length permits chunk-size overflow
30 Oct 202601:16
–cvelist
euvd
EUVD
EUVD-2026-113473
30 Oct 202601:16
–euvd
nvd
NVD
CVE-2026-91920
30 Oct 202602:17
–nvd
ptsecurity
Positive Technologies
PT-2026-133234
30 Oct 202600:00
–ptsecurity
redhatcve
RedhatCVE
CVE-2026-91920
29 Oct 202612:47
–redhatcve

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30 Oct 2026 00:00Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.16.5
3