Integer overflow in Libp2p Rust-libp2p
CVE-2026-33040
libp2p-rust is the official rust language Implementation of the libp2p networking stack. In versions prior to 0.49.3, the Gossipsub implementation accepts attacker-controlled PRUNE backoff values and may perform unchecked time arithmetic w…
Vulnerability class: Integer Overflow
EPSS: 0.000 (11.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Libp2p Rust-libp2p — versions < 0.49.3
- Protocol Libp2p-gossipsub
Weakness classification (CWE)
References
- https://github.com/libp2p/rust-libp2p/security/advisories/GHSA-gc42-3jg7-rxr2 (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-33040?
- CVE-2026-33040 is a high-severity vulnerability in Libp2p Rust-libp2p, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2026-03-20.
- How severe is CVE-2026-33040?
- High severity. CVSS v3 base score is 7.5 out of 10.