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CVE-2026-54896

LOW
2.1
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, when in object mode, Oj.dump is vulnerable to a heap buffer overflow when serializing Exception objects with a large :indent value. The serializer allocates a buffer sized for the object's attributes but does not account for the indent bytes added on each write. With indent: 5000, the accumulation of 5,000-byte indent strings overflows the 13,150-byte heap allocation, corrupting adjacent heap memory. This issue has been fixed in version 3.17.2.

Metadata

CVE ID
CVE-2026-54896
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-16 13:49 UTC
Published
2026-06-30 23:20 UTC
Last updated
2026-06-30 23:20 UTC
Primary CWE
CWE-122
CWE-122: Heap-based Buffer Overflow
Vendor / Product
ohler55 / oj
Sources
cve.org  ·  NVD

Severity & Metrics

2.1 LOW CVSS 4.0
CVSS:4.0/AV:L/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-122 cna CWE-122: Heap-based Buffer Overflow
CVSS scores (1)
ScoreSeverityVersionSourceVector
2.1 LOW 4.0 cna CVSS:4.0/AV:L/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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