What’s Vulnerable › Vulnerabilities

CVE-2026-78161: warmcat libwebsockets LECP CBOR Recording lecp.c report_raw_cbor out-of-bounds write

• Severity: high (CVSS 7.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-24 · updated 2026-10-12
• Weakness: CWE-119

Description

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.

Affected products

• warmcat libwebsockets: 4.5.0

References

• 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

Get alerted when CVE-2026-78161 or the next vulnerability affects your stack