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CVE-2026-54502

MEDIUM
6.3
CVSS 4.0
Description
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2, Oj.dump is vulnerable to a stack-based buffer overflow when a large :indent value is provided by the developer. fill_indent in dump.h calls memset(indent_str, ' ', (size_t)opts->indent) without validating the size. When opts->indent is set to INT_MAX (2,147,483,647), the (size_t) cast preserves the large value and memset writes 2 GB into the stack-allocated out buffer (4,184 bytes), corrupting the stack and crashing the process. This issue has been fixed in version 3.17.2.

Metadata

CVE ID
CVE-2026-54502
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-15 18:01 UTC
Published
2026-06-30 23:10 UTC
Last updated
2026-06-30 23:10 UTC
Primary CWE
CWE-121
CWE-121: Stack-based Buffer Overflow
Vendor / Product
ohler55 / oj
Sources
cve.org  ·  NVD

Severity & Metrics

6.3 MEDIUM CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Affected products (1)
VendorProductPlatformVersions
ohler55 oj — < 3.17.2
Weakness (CWE)
CWESourceDescription
CWE-121 cna CWE-121: Stack-based Buffer Overflow
CVSS scores (1)
ScoreSeverityVersionSourceVector
6.3 MEDIUM 4.0 cna CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
References (1)
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