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.

An update of the rubygem package has been released.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-54896)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2026-54896)

ID	Name	Product	Family	Type	Severity
332369	Photon OS 5.0: Rubygem PHSA-2026-5.0-92-0917	Nessus	PhotonOS Local Security Checks	Local	medium
325969	Photon OS 4.0: Rubygem PHSA-2026-4.0-1052	Nessus	PhotonOS Local Security Checks	Local	high
325967	Photon OS 5.0: Rubygem PHSA-2026-5.0-0917	Nessus	PhotonOS Local Security Checks	Local	medium
324706	Linux Distros Unpatched Vulnerability : CVE-2026-54896	Nessus	Misc.	Local	low
443713	SCA: security update for oj (GHSA-35w3-pjm6-wj95)	Tenable Cloud Security	SCA Checks	Local	low
443713	SCA: security update for oj (GHSA-35w3-pjm6-wj95)	Tenable Self-Hosted Container Security	SCA Checks	Local	low

Detections

Analytics

CVE-2026-54896

low

Tenable Plugins

medium

high

medium

low

low

low