ruby-oj: Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem
CVE-2026-54899 is fixed in ruby-oj on 1 platform, first by DEBIAN-CVE-2026-54899, released July 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. Prior to version 3.17.2, disabling symbol_keys on a reused Oj::Parser instance triggers a heap use-after-free. When symbol_keys is toggled from true to false, opt_symbol_keys_set frees the internal key cache (cache_free) but does not clear the pointer. The next parse call reads from the freed cache via cache_intern, producing a use-after-free. This issue has been fixed in version 3.17.2.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| ruby-oj · Debian 12.15 (bookworm) | 3.14.2-1+deb12u1 | DEBIAN-CVE-2026-54899 | Jul 3, 2026 |
| ruby-oj · Debian 13.5 (trixie) | 3.16.3-1+deb13u1 | DEBIAN-CVE-2026-54899 | Jul 3, 2026 |
| ruby-oj · Debian 14 | 3.17.3-1 | DEBIAN-CVE-2026-54899 | Jul 3, 2026 |
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