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.
Published: 2026-09-08
Score: 6.9 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Tue, 08 Sep 2026 19:00:00 +0000

Type Values Removed Values Added
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.
Title Cesanta mJS mjs_tok.c skip_spaces_and_comments heap-based overflow
First Time appeared Cesanta
Cesanta mjs
Weaknesses CWE-119
CWE-122
CPEs cpe:2.3:a:cesanta:mjs:*:*:*:*:*:*:*:*
Vendors & Products Cesanta
Cesanta mjs
References
Metrics cvssV2_0

{'score': 7.5, 'vector': 'AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 7.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 6.9, 'vector': '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'}

Subscriptions

Cesanta Mjs
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-09-08T19:08:36.351Z

Reserved: 2026-09-08T11:09:32.652Z

Link: CVE-2026-86716

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-09-08T19:20:17.357

Modified: 2026-09-08T19:53:13.400

Link: CVE-2026-86716

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses