CVE-2026-54696 | BDVDB-2026-344640 Detail

Description#

Ruby JSON is a JSON implementation for Ruby. Versions 2.9.0 through 2.19.8 are vulnerable to heap buffer overflow when the JSON generator is provided with an oversized streamed object. When streaming to an IO JSON.dump(obj, io) and JSON::State#generate(obj, io) can write past the internal JSON generator buffer when a streamed object contains an attacker-controlled string near 16 KB. Exploitation would result in a reliable process crash/denial of service. This issue has been fixed in version 2.19.9.

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.