CVE-2026-16554
CVE-2026-16554: 1 tracked advisory record across Red Hat. Compare source-reported impact, fixes and remediation.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityMedium6.8
Medium [CVE-2026-16554] Remote code execution due to integer overflow via crafted JSON
CVE-2026-16554Source published Source updated
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…
- Affected products in this advisory
- No product details extracted. Check the source bulletin.
- Source-reported affected versions
- 1.7.19
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- No mitigation is required for Red Hat Enterprise Linux, Red Hat Satellite, or OpenShift Container Platform, as these products are not affected due to their exclusively 64-bit architecture support. No upstream fix is currently available for other affected configurations (for example, cJSON as built for 32-bit architectures in Fedora). As a general precaution, applications using cJSON on a 32-bit platform should avoid processing untrusted JSON input containing very large numbers of control characters within a single string value.
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