warmcat libwebsockets 4.5.0 LECP CBOR Recording lib/misc/lecp.c report_raw_cbor out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k2.18+

Summaryinfo

A vulnerability identified as critical has been detected in warmcat libwebsockets 4.5.0. The affected element is the function report_raw_cbor of the file lib/misc/lecp.c of the component LECP CBOR Recording. This manipulation causes out-of-bounds write. This vulnerability appears as CVE-2026-78161. The attack may be initiated remotely. In addition, an exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability classified as critical was found in warmcat libwebsockets 4.5.0. Affected by this vulnerability is the function report_raw_cbor of the file lib/misc/lecp.c of the component LECP CBOR Recording. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-78161. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

It is possible to download the exploit at github.com. It is declared as proof-of-concept.

Applying the patch 1d44554a1bb262db63ff4e240152a9deecd99054 is able to eliminate this problem. The bugfix is ready for download at github.com.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Programming Language: 🔒
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 1d44554a1bb262db63ff4e240152a9deecd99054

Timelineinfo

08/23/2026 Advisory disclosed
08/23/2026 +0 days VulDB entry created
08/23/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-78161 (🔒)
GCVE (CVE): GCVE-0-2026-78161
GCVE (VulDB): GCVE-100-394543
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/23/2026 13:58
Changes: 08/23/2026 13:58 (59)
Complete: 🔍
Submitter: biniam
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #883225: warmcat libwebsockets 4.5.99-v4.5.0-508-gb4b5aed39 Out-of-bounds Write (by biniam)

Be aware that VulDB is the high quality source for vulnerability data.

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