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RUSTSEC-2026-0535
libp2p-gossipsubWhen a peer sent a PRUNE control message, the backoff it asked for was turned into an expiry time with Instant::now() + Duration::from_secs(backoff). That addition panics on overflow, so a peer that sends a PRUNE with a very large backoff, such as u64::MAX, crashes the node. No authentication is needed beyond an ordinary libp2p connection with the gossipsub protocol, and the attacker can repeat it after every restart.
The fix uses Instant::checked_add in BackoffStorage::update_backoff and ignores a backoff that would overflow. It is in 0.49.3.
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Measures severity based on intrinsic characteristics of the vulnerability, independent of environment.
No exploitation activity has been observed at this time. Continue routine monitoring.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
- CVE-2026-33040Alias
- EUVD-2026-13581Alias
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