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SCA: security update for oj (GHSA-fm7p-mprw-wjm9)

medium Tenable Cloud Security Plugin ID 443665

Description

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
 3.17.3, Oj.load in :object mode reads uninitialized stack memory (and, for long keys, reads out of bounds)
 when parsing a JSON object whose key is 254 bytes or longer. The interned bytes can surface to the caller,
 disclosing process stack memory. In ext/oj/intern.c, form_attr() handles the long-key path by allocating a
 heap buffer, `b`, populating it with the attribute name, and then freeing it — but it passed the
 uninitialized stack buffer buf (not b) to rb_intern3(). rb_intern3 therefore reads len + 1 bytes of
 uninitialized stack memory. When the key length is >= 256, it also reads out of bounds past the 256-byte
 buf. The resulting bytes are interned and can reach the caller via the produced Symbol or via the
 EncodingError message raised on invalid UTF-8, leaking process stack contents. This issue has been fixed
 in version 3.17.3. (CVE-2026-54500)

Solution

Update the oj library and its related packages to version 3.17.3 or later.

See Also

https://github.com/advisories/GHSA-fm7p-mprw-wjm9

Plugin Details

Severity: Medium

ID: 443665

Version: Revision 1.3

Type: Local

Family: SCA Checks

Published: 6/20/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2026-54500

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/19/2026

Vulnerability Publication Date: 6/19/2026

Reference Information

CVE: CVE-2026-54500