Packages
- libwebsockets - C library for building WebSocket-based network applications
Details
It was discovered that libwebsockets did not properly validate
user-supplied data when parsing HTTP/2 HPACK path headers, which could
result in a write past the end of an allocated buffer. An attacker could
possibly use this issue to execute arbitrary code. (CVE-2026-19773)
It was discovered that libwebsockets did not properly handle CBOR
recording in the LECP parser, which could result in a write past the end
of an allocated buffer. An attacker could possibly use this issue to
cause a crash or execute arbitrary code. (CVE-2026-78161)
It was discovered that libwebsockets did not properly validate
user-supplied data when parsing HTTP/2 HPACK path headers, which could
result in a write past the end of an allocated buffer. An attacker could
possibly use this issue to execute arbitrary code. (CVE-2026-19773)
It was discovered that libwebsockets did not properly handle CBOR
recording in the LECP parser, which could result in a write past the end
of an allocated buffer. An attacker could possibly use this issue to
cause a crash or execute arbitrary code. (CVE-2026-78161)
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 26.04 LTS resolute | libwebsockets19t64 – 4.3.5-3ubuntu1.2+esm1 | ||
| 24.04 LTS noble | libwebsockets19t64 – 4.3.3-1.1ubuntu0.1~esm3 | ||
| 22.04 LTS jammy | libwebsockets16 – 4.0.20-2ubuntu1.1+esm2 | ||
| 20.04 LTS focal | libwebsockets15 – 3.2.1-3ubuntu0.1~esm3 | ||
| 18.04 LTS bionic | libwebsockets8 – 2.0.3-3ubuntu0.1~esm1 | ||
| 16.04 LTS xenial | libwebsockets7 – 1.7.1-1ubuntu0.1~esm1 | ||
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