CVE-2026-78161
warmcat libwebsockets LECP CBOR Recording lecp.c report_raw_cbor out-of-bounds write
- State
- Published
- Severity
- 6.9 Medium
- Published
- Aug 24, 2026
- Updated
- Aug 24, 2026
- Reserved
- Aug 23, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 7.3 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C | VulDB |
| 3.0 | 7.3 High | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C | VulDB |
| 2.0 | 7.5 High | AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
libwebsocketswarmcat |
|
References
- VDB-394543 | warmcat libwebsockets LECP CBOR Recording lecp.c report_raw_cbor out-of-bounds writevdb-entrytechnical-description
- VDB-394543 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-78161 | CVE Analysis and Reportthird-party-advisory
- Submit #883225 | warmcat libwebsockets 4.5.99-v4.5.0-508-gb4b5aed39 Out-of-bounds Writethird-party-advisory
- https://github.com/biniamf/pocs/tree/main/libwebsockets-lecp-lecp_parse-cbor_pos_oob_writeexploit
- https://github.com/biniamf/pocs/blob/main/libwebsockets-lecp-lecp_parse-cbor_pos_oob_write/poc_lecp_cbor_pos_oob.cexploit
- https://github.com/warmcat/libwebsockets/commit/1d44554a1bb262db63ff4e240152a9deecd99054patch
- https://github.com/warmcat/libwebsockets/product
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