CVE-2026-86716CWE-119CWE-122

CVE-2026-86716

High · published September 8, 2026

CVSS v3.1
7.3
EPSS
1%
Percentile
46.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.3 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS v4.0
6.9 · 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
EPSS
0.00570 · 46.4th percentile
Weaknesses
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer; CWE-122 · Heap-based Buffer Overflow
Published
2026-09-08T23:20Z
References (7)
https://github.com/cesanta/mjs/ · [email protected]https://github.com/cesanta/mjs/issues/324 · [email protected]https://vuldb.com/cve/CVE-2026-86716 · [email protected]https://vuldb.com/submit/910881 · [email protected]https://vuldb.com/submit/910882 · [email protected]https://vuldb.com/vuln/399773 · [email protected]https://vuldb.com/vuln/399773/cti · [email protected]
EPSS history
Timeline
  • 10 SEP 03:18Z
    EPSS moved — → 0%
    epss
  • 08 SEP 18:45Z
    Cesanta mJS mjs_tok.c skip_spaces_and_comments heap-based overflow
    cvelistv5