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h11 accepts some malformed Chunked-Encoding bodies

🗓️ 24 Apr 2025 16:07:56Reported by GitHub Advisory DatabaseType 
github
 github🔗 github.com👁 11 Views

h11 allows malformed Chunked-Encoding leading to request smuggling vulnerabilities under specific conditions.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: IBM Fusion and IBM Fusion HCI are vulnerable to request smuggling due to python package h11 (CVE-2025-43859)
17 Jun 202517:43
–ibm
IBM Security Bulletins		Security Bulletin: Multiple vulnerabilities in IBM Business Automation Workflow Machine Learning Server are addressed with 24.0.0-IF006
6 Aug 202515:40
–ibm
IBM Security Bulletins		Security Bulletin: Multiple Vulnerabilities in IBM CloudPak for AIOps
30 Jul 202517:05
–ibm
IBM Security Bulletins		Security Bulletin: IBM watsonx Orchestrate Cartridge affected by vulnerability in h11-0.14.0-py3-none-any.whl
26 Sep 202511:04
–ibm
IBM Security Bulletins		Security Bulletin: IBM watsonx Orchestrate Developer Edition affected by vulnerability in h11-0.14.0-py3-none-any.whl CVE-2025-43859
22 Oct 202510:32
–ibm
IBM Security Bulletins		Security Bulletin: IBM Security QRadar EDR Software contains multiple vulnerabilities
11 Jun 202513:20
–ibm
IBM Security Bulletins		Security Bulletin: IBM watsonx Code Assistant On Prem product affected by h11 HTTP Chunk Handling Vulnerability
15 Sep 202514:46
–ibm
IBM Security Bulletins		Security Bulletin: IBM Maximo Application Suite Ai-Service Component uses h11 is a Python implementation of HTTP/1.1. Prior to version 0.16.0, a leniency in h11's parsing of line terminators in chunked-coding message bodies.
20 May 202511:48
–ibm
IBM Security Bulletins		Security Bulletin: Astronomer with IBM is vulnerable to request smuggling due to the h11 package (CVE-2025-43859).
11 Aug 202522:07
–ibm
AstraLinux		 Astra Linux - уязвимость в python-h11
16 Jun 202511:28
–astralinux
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Vulners
Node
h11python_3.10_h11Range<0.16.0pip

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24 Apr 2025 21:41Current
7.1High risk
Vulners AI Score7.1
CVSS 3.19.1
EPSS0.00202
SSVC
CWE-444
malformed chunked-encodingrequest smuggling vulnerabilitiesh11 parsing issueproxy interpretation error
11