CVE-2026-54896 | BDVDB-2026-344641 Detail

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.

Impact#

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Exploit#

History#

1. Version 12026-06-30Record published in the CVE List.
2. Version 22026-07-01Most recent update recorded in the CVE List.