RubyGems/oj CVE-2026-54899: medium 6.3, EPSS 0.41%

Oj: Use-After-Free in Oj::Parser Symbol Key Cache Toggle

Action: Upgrade oj to 3.17.2 or later.

bundle update oj

Affected

Fixed versions

Sources

• osv: GHSA-2cw7-v8ff-p88r
• nvd: CVE-2026-54899
• https://github.com/ohler55/oj/security/advisories/GHSA-2cw7-v8ff-p88r
• https://github.com/ohler55/oj
• https://github.com/rubysec/ruby-advisory-db/blob/master/gems/oj/CVE-2026-54899.yml
• https://www.cve.org/CVERecord/SearchResults?query=CVE-2026-54899

CVE-2026-54899 · published 2026-06-19T19:34:30Z · modified 2026-10-06T20:00:05.191640486Z · JSON