Integer Overflow or Wraparound Affecting libp2p-gossipsub package, versions <0.49.3
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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- published28 Mar 2026
- disclosed20 Mar 2026
- creditevofusion
Introduced: 20 Mar 2026
NewCVE-2026-33040 (opens in a new tab)How to fix?
Upgrade libp2p-gossipsub to version 0.49.3 or higher.
Overview
Affected versions of this package are vulnerable to Integer Overflow or Wraparound via the backoff process. An attacker can cause the application to crash by sending specially crafted PRUNE control messages with extremely large backoff values, resulting in unchecked time arithmetic and triggering a panic in the networking state machine. This is remotely exploitable over a standard network connection without authentication.