CVE-2026-86716

Cesanta mJS mjs_tok.c skip_spaces_and_comments heap-based overflow

Published: Sep 8, 2026Updated: Sep 8, 2026 Sources: CVE List NVDCWE-119

7.3HIGH

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:LConfidentiality

Low

I:LIntegrity

Low

A:LAvailability

Low

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Weaknesses

CWE-119 CWE-122

Affected Products

Cesanta

oss-project

mJS

OSS Libraries

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Initial Access

Privilege Escalation

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References

https://vuldb.com/vuln/399773

vuldb.com

https://vuldb.com/vuln/399773/cti

vuldb.com

https://vuldb.com/cve/CVE-2026-86716

vuldb.com

and 4 more references View all →

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