CVE-2026-54903 (GCVE-0-2026-54903)

Vulnerability from cvelistv5 – Published: 2026-06-30 23:42 – Updated: 2026-07-01 12:43
VLAI
Title
Oj: Integer Overflow in Oj.load 2GB String Handling
Summary
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2, Oj.load is vulnerable to heap corruption when parsing a JSON string longer than 2 GB. An integer overflow in buf_append_string (buf.h:61) converts the string length to a large negative size_t, causing memcpy to copy an astronomically large amount of data out of bounds. This crashes the process and can corrupt adjacent heap memory. The issue has been fixed in version 3.17.2.
Severity
6.3 (Medium)
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
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-01 12:43 UTC
CWE
  • CWE-190 - Integer Overflow or Wraparound
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 8077 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
ohler55 oj Affected: < 3.17.2
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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