Description
In mjs_json.c in Cesanta MongooseOS mJS 1.26, a maliciously formed JSON string can trigger an off-by-one heap-based buffer overflow in mjs_json_parse, which can potentially lead to redirection of control flow. NOTE: the original reporter disputes the significance of this finding because "there isn’t very much of an opportunity to exploit this reliably for an information leak, so there isn’t any real security impact."
Scores
CVSS v3
9.8
EPSS
0.0055
EPSS Percentile
68.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-193
CWE-787
Status
published
Products (1)
cesanta/mongooseos_mjs
1.26
Published
Apr 29, 2021
Tracked Since
Feb 18, 2026