CVE-2026-54901Disclosure

LOWCVSS 6.3 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2, Oj::Parser in usual mode does not mark array_class and hash_class references during garbage collection, leading to Use-After-Free. If GC runs after the class is assigned but before a parse, the class object is reclaimed, leaving the parser holding a dangling VALUE. The subsequent parse call dereferences the freed object, producing a segfault. This issue has been fixed in version 3.17.2.

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0.5/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-416

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Threat summary

Patch or workaround signal is available
2 mentions across 1 observed day

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 2 signals
Disclosure: 2 classified signals
2 total mentions across 1 day

Deep dive

Activity timeline2 mentions / 1d

Signal classification1 categories

Disclosure

2100.0%

Referenced assets2 URLs

By indicator

Full discourse2 posts

Infoflowcloud@infoflowcloud91d
Disclosure
🚨*CVE* CVE-2026-54901 Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2, Oj::Parser in usual mode does not mark array_class and… https://www.cve.org/CVERecord?id=CVE-2026-54901 ----- Traducción: CVE-2026-54901 Oj … http://infoflow.cloud`
Post summary
The text declares CVE‑2026‑54901 in the Ruby gem Oj, detailing a parser issue before version 3.17.2, but it provides no PoC, exploit, or patch information.
0000037
90 followersView on X
CVE@CVEnew91d
Disclosure
CVE-2026-54901 Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2, Oj::Parser in usual mode does not mark array_class and… https://www.cve.org/CVERecord?id=CVE-2026-54901
Post summary
The text announces CVE-2026-54901 as an issue in the Oj Ruby gem before version 3.17.2, describing a parsing defect and indicating that upgrading to 3.17.2 resolves the vulnerability; no PoC, exploit, or active exploitation is mentioned.
00000810
57.7K followersView on X

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