Because project creator contact attempts were unsuccessful, the vulnerability has only been confirmed in version 1.7.19 but may also affect other versions.
Analysis and contextual insights are available on OpenCVE Cloud.
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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Mon, 27 Jul 2026 11:30:00 +0000
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ssvc
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Mon, 27 Jul 2026 10:45:00 +0000
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Davegamble
Davegamble cjson |
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Davegamble
Davegamble cjson |
Mon, 27 Jul 2026 09:00:00 +0000
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| Description | cJSON library is vulnerable to an integer overflow in the print_string_ptr() function in cJSON.c on 32-bit platforms. The escape_characters counter, a 32-bit size_t, can wrap around when processing strings containing approximately 858,993,460 or more control characters, causing the output buffer to be allocated based on an underestimated length. When cJSON_PrintBuffered() is used with a pre-allocated buffer, the subsequent write loop overflows the heap allocation. An attacker supplying a crafted JSON string to an application using cJSON on a 32-bit platform can cause a heap buffer overflow, potentially leading to remote code execution, information disclosure, or denial of service. Because project creator contact attempts were unsuccessful, the vulnerability has only been confirmed in version 1.7.19 but may also affect other versions. | |
| Title | Integer Overflow Leading to Heap Buffer Overflow in cJSON | |
| Weaknesses | CWE-190 | |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: CERT-PL
Published:
Updated: 2026-07-27T10:24:23.056Z
Reserved: 2026-07-22T11:49:39.961Z
Link: CVE-2026-16554
Updated: 2026-07-27T10:24:19.293Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-07-27T10:30:12Z