CVE-2025-57052

9.8 criticalEPSS 0.7%

Critical (9.8) in davegamble cjson. EPSS 0.7% chance of exploitation in the next 30 days.

cJSON 1.5.0 through 1.7.18 allows out-of-bounds access via the decode_array_index_from_pointer function in cJSON_Utils.c, allowing remote attackers to bypass array bounds checking and access restricted data via malformed JSON pointer strings containing alphanumeric characters.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 54% of CVEs (scores of 2026-10-31)
CWEs: CWE-125, CWE-129
Published: 2025-09-03
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

davegamble:cjson

References

https://x-0r.com/posts/cJSON-Array-Index-Parsing-Vulnerability
https://lists.debian.org/debian-lts-announce/2025/09/msg00019.html

Check your stack JSON