Infinite loop Affecting concurrent-ruby package, versions <1.3.7
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RUBY-CONCURRENTRUBY-17391432
- published21 Jun 2026
- disclosed19 Jun 2026
- creditPranjali Thakur
Introduced: 19 Jun 2026
NewCVE-2026-54904 (opens in a new tab)How to fix?
Upgrade concurrent-ruby to version 1.3.7 or higher.
Overview
Affected versions of this package are vulnerable to Infinite loop in the AtomicReference#update function when the current value is Float::NAN. An attacker can cause indefinite busy retry loops and CPU exhaustion by supplying malicious numeric data.