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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| libwebsockets | libwebsockets | unknown |
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Project Subscriptions
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No advisories yet.
Solution
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Workaround
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Tue, 15 Sep 2026 18:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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 | |
| References |
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| Metrics |
cvssV3_0
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Projects
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MITRE
Status: PUBLISHED
Assigner: zdi
Published:
Updated: 2026-09-15T19:20:40.024Z
Reserved: 2026-08-13T17:33:16.820Z
Link: CVE-2026-19773
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-09-15T19:17:17.747
Modified: 2026-09-15T19:17:17.747
Link: CVE-2026-19773
Redhat
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OpenCVE Enrichment
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