Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Cesanta | mJS | 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 1.10, 1.11, 1.12, 1.13, 1.14, 1.15, 1.16, 1.17, 1.18, 1.19, 1.20, 1.21, 1.22, 1.23, 1.24, 1.25, 1.26 | — |
References
- VDB-399773 | Cesanta mJS mjs_tok.c skip_spaces_and_comments heap-based overflow vdb-entry technical-description
- VDB-399773 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- CVE-2026-86716 | CVE Analysis and Report third-party-advisory
- Submit #910881 | cesanta mJS v1.26 Heap-based Buffer Overflow third-party-advisory
- Submit #910882 | cesanta mJS v1.26 Heap-based Buffer Overflow (Duplicate) third-party-advisory
- https://github.com/cesanta/mjs/issues/324 exploit issue-tracking
- https://github.com/cesanta/mjs/ product