DEBIAN-CVE-2026-19773
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-19773
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19773.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-19773
- Upstream
- Published
- 2026-09-15T19:17:17Z
- Modified
- 2026-09-29T13:03:36Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
Affected packages
Debian:12 / libwebsockets
Package
- Name
- libwebsockets
- Purl
- pkg:deb/debian/libwebsockets?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:13 / libwebsockets
Package
- Name
- libwebsockets
- Purl
- pkg:deb/debian/libwebsockets?arch=source&distro=trixie
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:14 / libwebsockets
Package
- Name
- libwebsockets
- Purl
- pkg:deb/debian/libwebsockets?arch=source&distro=forky