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CVE-2026-23527: Inconsistent Interpretation of HTTP Requests

🗓️ 15 Jan 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com👁 4 Views

HTTP Request Smuggling in H3 prior to 1.15.5 due to case-sensitive Transfer-Encoding check.

Related
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-23527
15 Jan 202619:24
–attackerkb
circl
Circl
CVE-2026-23527
15 Jan 202621:00
–circl
cnnvd
CNNVD
H3 Environmental Issues and Vulnerabilities
15 Jan 202600:00
–cnnvd
cve
CVE
CVE-2026-23527
15 Jan 202619:24
–cve
cvelist
Cvelist
CVE-2026-23527 h3 v1 has Request Smuggling (TE.TE) issue
15 Jan 202619:24
–cvelist
euvd
EUVD
EUVD-2026-2737
15 Jan 202619:24
–euvd
github
Github Security Blog
h3 v1 has Request Smuggling (TE.TE) issue
15 Jan 202620:10
–github
mend
Mend
CVE-2026-23527
15 Jan 202619:24
–mend
nvd
NVD
CVE-2026-23527
15 Jan 202620:16
–nvd
osv_clsa
osv_clsa
CLSA-2026-1790616002 TuxCare security update for h3 (2 CVEs)
28 Sep 202617:20
–osv_clsa
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13 Apr 2026 00:00Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.18.9 - 9.8
EPSS0.00626
SSVC
4