libwebsockets: A vulnerability was found in warmcat libwebsockets 4.5.0
CVE-2026-78161 is fixed in 7 products on 1 platform, first by libwebsockets-evlib-ev 4.3.3-1.1ubuntu0.1~esm2, released August 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.
A vulnerability was found in warmcat libwebsockets 4.5.0. Impacted is the function report_raw_cbor of the file lib/misc/lecp.c of the component LECP CBOR Recording. The manipulation results in out-of-bounds write. The attack can be launched remotely. The exploit has been made public and could be used. The patch is identified as 1d44554a1bb262db63ff4e240152a9deecd99054. It is best practice to apply a patch to resolve this issue.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libwebsockets · Debian 13.5 (trixie) | 4.3.5-1+deb13u2 | DEBIAN-CVE-2026-78161 | Sep 1, 2026 |
| libwebsockets · Debian 14 | 4.3.5-6 | DEBIAN-CVE-2026-78161 | Sep 1, 2026 |
| libwebsockets-evlib-ev · Ubuntu 24.04.5 LTS (noble) | 4.3.3-1.1ubuntu0.1~esm2 | libwebsockets-evlib-ev 4.3.3-1.1ubuntu0.1~esm2 | Aug 23, 2026 |
| libwebsockets-evlib-ev · Ubuntu 26.04.1 LTS (resolute) | 4.3.5-3ubuntu1.1 | libwebsockets-evlib-ev 4.3.5-3ubuntu1.1 | Aug 23, 2026 |
| libwebsockets-evlib-glib · Ubuntu 24.04.5 LTS (noble) | 4.3.3-1.1ubuntu0.1~esm2 | libwebsockets-evlib-glib 4.3.3-1.1ubuntu0.1~esm2 | Aug 23, 2026 |
| libwebsockets-evlib-glib · Ubuntu 26.04.1 LTS (resolute) | 4.3.5-3ubuntu1.1 | libwebsockets-evlib-glib 4.3.5-3ubuntu1.1 | Aug 23, 2026 |
| libwebsockets-evlib-uv · Ubuntu 24.04.5 LTS (noble) | 4.3.3-1.1ubuntu0.1~esm2 | libwebsockets-evlib-uv 4.3.3-1.1ubuntu0.1~esm2 | Aug 23, 2026 |
| libwebsockets-evlib-uv · Ubuntu 26.04.1 LTS (resolute) | 4.3.5-3ubuntu1.1 | libwebsockets-evlib-uv 4.3.5-3ubuntu1.1 | Aug 23, 2026 |
| libwebsockets-test-server · Ubuntu 24.04.5 LTS (noble) | 4.3.3-1.1ubuntu0.1~esm2 | libwebsockets-test-server 4.3.3-1.1ubuntu0.1~esm2 | Aug 23, 2026 |
| libwebsockets-test-server · Ubuntu 26.04.1 LTS (resolute) | 4.3.5-3ubuntu1.1 | libwebsockets-test-server 4.3.5-3ubuntu1.1 | Aug 23, 2026 |
| libwebsockets-test-server-common · Ubuntu 24.04.5 LTS (noble) | 4.3.3-1.1ubuntu0.1~esm2 | libwebsockets-test-server-common 4.3.3-1.1ubuntu0.1~esm2 | Aug 23, 2026 |
| libwebsockets-test-server-common · Ubuntu 26.04.1 LTS (resolute) | 4.3.5-3ubuntu1.1 | libwebsockets-test-server-common 4.3.5-3ubuntu1.1 | Aug 23, 2026 |
| libwebsockets19t64 · Ubuntu 24.04.5 LTS (noble) | 4.3.3-1.1ubuntu0.1~esm2 | libwebsockets19t64 4.3.3-1.1ubuntu0.1~esm2 | Aug 23, 2026 |
| libwebsockets19t64 · Ubuntu 26.04.1 LTS (resolute) | 4.3.5-3ubuntu1.1 | libwebsockets19t64 4.3.5-3ubuntu1.1 | Aug 23, 2026 |
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