cvedb.io
CVE-2021-31875
CRITICAL · CVSS 9.8
EPSS exploitation probability: 0%
Published 2021-04-29T02:15:08.043 · Last modified 2026-06-17T03:52:23.537

Summary

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."

Affected products

cesanta — mongooseos_mjs

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.