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Vulnerability record · CVE-2025-57052 · published 3 September 2025

CVE-2025-57052: Davegamble cjson out-of-bounds read vulnerability

DDavegamble · Cjson

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.

9.8 CVSS 3.1 Critical EPSS 0.74% · top 47.1% CWE-125 · Out-of-bounds readCWE-129 · CWE-129
9.8CVSS 3.1 base score
0.74%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2019-11834Davegamble cjson out-of-bounds read vulnerabilitycJSON before 1.7.11 allows out-of-bounds access, related to \x00 in a string literal.EPSS 2.5%9.8CVE-2019-11835Davegamble cjson out-of-bounds read vulnerabilitycJSON before 1.7.11 allows out-of-bounds access, related to multiline comments.EPSS 2.6%9.8CVE-2016-10749Davegamble cjson out-of-bounds read vulnerabilityparse_string in cJSON.c in cJSON before 2016-10-02 has a buffer over-read, as demonstrated by a string that begins with a " character and ends with a…EPSS 2.5%9.8CVE-2018-1000217Davegamble cjson use after free vulnerabilityDave Gamble cJSON version 1.7.3 and earlier contains a CWE-416: Use After Free vulnerability in cJSON library that can result in Possible crash, corr…EPSS 1.8%8.8CVE-2018-1000216Davegamble cjson double free vulnerabilityDave Gamble cJSON version 1.7.2 and earlier contains a CWE-415: Double Free vulnerability in cJSON library that can result in Possible crash or RCE. …EPSS 1.5%8.7CVE-2026-67215Davegamble cjson vulnerabilitycJSON through 1.7.19 is vulnerable to uncontrolled recursion leading to stack exhaustion when an untrusted RFC 6902 JSON Patch is applied via cJSONUt…EPSS 0.70%8.2CVE-2026-67216Davegamble cjson vulnerabilitycJSON through 1.7.19 contains an inefficient algorithmic complexity flaw in cJSON_Compare(). When comparing objects, the function recurses into each …EPSS 0.65%7.5CVE-2023-50471Davegamble cjson null pointer dereference vulnerabilitycJSON v1.7.16 was discovered to contain a segmentation violation via the function cJSON_InsertItemInArray at cJSON.c.EPSS 1.5%

Source: NIST National Vulnerability Database (record CVE-2025-57052), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.