Out-of-Bounds The advisory has been revoked - it doesn't affect any version of package libwebsockets (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN12-LIBWEBSOCKETS-19235267
- published25 Aug 2026
- disclosed24 Aug 2026
Introduced: 24 Aug 2026
CVE-2026-78161 (opens in a new tab)Amendment
The Debian security team deemed this advisory irrelevant for Debian:12.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libwebsockets package and not the libwebsockets package as distributed by Debian.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2026-78161
- https://github.com/biniamf/pocs/blob/main/libwebsockets-lecp-lecp_parse-cbor_pos_oob_write/poc_lecp_cbor_pos_oob.c
- https://github.com/biniamf/pocs/tree/main/libwebsockets-lecp-lecp_parse-cbor_pos_oob_write
- https://github.com/warmcat/libwebsockets/
- https://github.com/warmcat/libwebsockets/commit/1d44554a1bb262db63ff4e240152a9deecd99054
- https://vuldb.com/cve/CVE-2026-78161
- https://vuldb.com/submit/883225
- https://vuldb.com/vuln/394543
- https://vuldb.com/vuln/394543/cti