Inefficient Algorithmic Complexity Affecting net-imap package, versions <0.4.24>=0.5.0, <0.5.14>=0.6.0, <0.6.4
Threat Intelligence
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-NETIMAP-16420226
- published6 May 2026
- disclosed4 May 2026
- creditMasamune
Introduced: 4 May 2026
NewCVE-2026-42245 (opens in a new tab)How to fix?
Upgrade net-imap to version 0.4.24, 0.5.14, 0.6.4 or higher.
Overview
Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity through the ResponseReader class. An attacker can exhaust the client's CPU by sending specially crafted IMAP responses containing many string literals, leading to significant performance degradation in the client's receiver thread.