libwebsockets HTTP/2 HPACK Path Header Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of libwebsockets. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the parsing of HTTP/2 HPACK path header. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-31036.
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Thu, 17 Sep 2026 20:30:00 +0000
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Tue, 15 Sep 2026 20:30:00 +0000
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Tue, 15 Sep 2026 18:30:00 +0000
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| Description | libwebsockets HTTP/2 HPACK Path Header Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of libwebsockets. Authentication is not required to exploit this vulnerability. The specific flaw exists within the parsing of HTTP/2 HPACK path header. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-31036. | |
| Title | libwebsockets HTTP/2 HPACK Path Header Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability | |
| Weaknesses | CWE-787 | |
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cvssV3_0
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Status: PUBLISHED
Assigner: zdi
Published: 2026-09-15T18:01:09.199Z
Updated: 2026-09-16T03:57:34.021Z
Reserved: 2026-08-13T17:33:16.820Z
Link: CVE-2026-19773
Updated: 2026-09-15T19:20:36.563Z
Status : Awaiting Analysis
Published: 2026-09-15T19:17:17.747
Modified: 2026-09-18T19:10:46.443
Link: CVE-2026-19773
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