CVE-2026-86716: medium-severity vulnerability in Cesanta mJS
Cesanta mJS mjs_tok.c skip_spaces_and_comments heap-based overflow
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
33Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 6.9epss 0.6%
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.
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
Affected products
Cesanta · mJSpublic PoCs found — 1
cve_referencegithub.com/cesanta/mjs/issues/324unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.