Integer Overflow or Wraparound Affecting yamux package, versions >=0.13.0 <0.13.9
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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- published15 Mar 2026
- disclosed13 Mar 2026
- creditRevofusion
Introduced: 13 Mar 2026
NewCVE-2026-31814 (opens in a new tab)How to fix?
Upgrade yamux to version 0.13.9 or higher.
Overview
Affected versions of this package are vulnerable to Integer Overflow or Wraparound via the WindowUpdate process. An attacker can cause a panic in the connection state machine by sending a specially crafted WindowUpdate message that triggers arithmetic overflow in send-window accounting. This can be exploited remotely over a normal network connection without authentication.