CVE Catalog

CVE-2026-86716

HighCVSS 7.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.35%

28th percentile - higher than 28% of all known CVEs

Summary

A vulnerability was determined in Cesanta mJS up to 1.26. Affected is the function skip_spaces_and_comments of the file src/mjs_tok.c. Executing a manipulation can lead to heap-based buffer overflow. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.

Risk Assessment

The risk is the potential for remote code execution or system crash in applications using mJS, potentially leading to integrity and availability breaches.

Recommendation

It is recommended to monitor mJS project updates and apply a patch as soon as it is released. Temporarily restrict access to services using mJS.

Related vulnerabilities

Original NVD description (English source)

A vulnerability was determined in Cesanta mJS up to 1.26. Affected is the function skip_spaces_and_comments of the file src/mjs_tok.c. Executing a manipulation can lead to heap-based buffer overflow. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS