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SCA: security update for concurrent-ruby (GHSA-6wx8-w4f5-wwcr)

low Tenable Self-Hosted Container Security Plugin ID 443732

Description

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

 - concurrent-ruby is a modern concurrency tools for Ruby. Prior to 1.3.7,
 Concurrent::ReadWriteLock#release_write_lock does not verify that the calling thread acquired the write
 lock. Any thread with access to the lock object can release an active write lock held by another thread. A
 second writer can then enter its critical section while the first writer is still running.
 Concurrent::ReadWriteLock#release_read_lock also decrements the shared counter even when no read lock is
 held. Calling it on a fresh lock changes the counter from 0 to -1, after which normal read acquisition
 raises Concurrent::ResourceLimitError. This is a synchronization correctness issue in the public
 Concurrent::ReadWriteLock API. This vulnerability is fixed in 1.3.7. (CVE-2026-54906)

Solution

Update the concurrent-ruby library and its related packages to version 1.3.7 or later.

See Also

https://github.com/advisories/GHSA-6wx8-w4f5-wwcr

Plugin Details

Severity: Low

ID: 443732

Version: Revision 1.5

Type: Local

Family: SCA Checks

Published: 6/20/2026

Updated: 6/30/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.02

Vendor

Vendor Severity: Low

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-54906

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

CVSS v4

Risk Factor: Low

Base Score: 2.1

Threat Score: 0.5

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

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-2026-54906