CVE-2026-33040: Gossipsub PRUNE.backoff Duration Overflow

CVE-2026-33040 · Severity: medium · CVSS 4 · Published 2026-03-18

Gossipsub PRUNE.backoff Duration Overflow

Vendors: crates.io.

Quick answers

Is CVE-2026-33040 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-33040 being exploited in the wild.
How severe is CVE-2026-33040?
Medium severity, with a CVSS score of 4, published 18 March 2026.
Which products and versions are affected?
libp2p-gossipsub (crates.io) SEMVER:introduced=0,fixed=0.49.3.
Is there a fix for CVE-2026-33040?
Yes. libp2p-gossipsub (crates.io): upgrade to 0.49.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-33040?
Check whether you run libp2p-gossipsub (crates.io) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • libp2p-gossipsub (crates.io): upgrade to 0.49.3 or later
    cargo update -p libp2p-gossipsub

Affected products

  • libp2p-gossipsub (crates.io) SEMVER:introduced=0,fixed=0.49.3

Identifiers

  • CVE-2026-33040
  • GHSA-gc42-3jg7-rxr2

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