Lucene search
+L

CVE-2026-71554: Inconsistent Interpretation of HTTP Requests

🗓️ 06 Aug 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com

h2 up to 4.4.0 allows request smuggling via multiple Host headers in HTTP/2 requests.

Related
Refs
ReporterTitlePublishedViews
Family
githubexploit
GithubExploit
Exploit for CVE-2026-71554
7 Aug 202621:15
–githubexploit
attackerkb
attackerkb
CVE-2026-71554
6 Aug 202621:46
–attackerkb
cgr
Chainguard
CVE-2026-71554 vulnerabilities
7 Aug 202620:22
–cgr
circl
Circl
CVE-2026-71554
6 Aug 202623:32
–circl
cve
CVE
CVE-2026-71554
6 Aug 202621:46
–cve
cvelist
Cvelist
CVE-2026-71554 h2: Duplicate Host header could facilitate request smuggling
6 Aug 202621:46
–cvelist
debiancve
Debian CVE
CVE-2026-71554
6 Aug 202621:46
–debiancve
euvd
EUVD
EUVD-2026-54177
6 Aug 202621:46
–euvd
github
Github Security Blog
h2: Duplicate Host header could facilitate request smuggling
6 Aug 202621:53
–github
kitploit
Kitploit
poc-h2-CVE-2026-71554
25 Sep 202609:52
–kitploit
Rows per page

Data

Build on a solid foundation with Vulners data

We provide the essential building blocks for cybersecurity solutions with comprehensive, structured, and constantly updated vulnerability and exploits data

Api

Power your application with Vulners API

The Vulners REST API offers reliable, high-performance access to vulnerability intelligence, with 99.9% SLA uptime and CDN-backed data delivery for seamless global access

App

Assess and manage vulnerabilities with Vulners tools

Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation

18 Sep 2026 00:00Current
5.7Medium risk
Vulners AI Score5.7
CVSS 3.15.3
EPSS0.00418
SSVC
0