CVE-2026-95859libp2p-rust: Gossipsub GRAFT topics unbounded growth
Updated under an hour ago ()
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It affects libp2p rust-libp2p. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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libp2p-rust is the official Rust language implementation of the libp2p networking stack. Prior to 0.49.5, Gossipsub GRAFT control-message handling unconditionally adds attacker-supplied topic hashes to connected_peer.topics without confirming that the peer previously subscribed to those topics. A remote unauthenticated peer that can reach a Gossipsub listener can repeatedly send novel GRAFT topics, causing cumulative per-peer memory growth that is not bounded by subscription filters, peer scoring, or per-message size limits. This can exhaust process memory and cause a denial of service. This issue is fixed in version 0.49.5.
- CVSS
- 8.7 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-770
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 16, 2026
Affected products
libp2p rust-libp2p libp2p:rust_libp2p (from the name) | before 0.49.5 | CNA record |
References
- https://github.com/libp2p/rust-libp2p/security/advisories/GHSA-g3g5-x568-qvqxx-refsource-confirm
- https://github.com/libp2p/rust-libp2p/pull/6608x-refsource-misc
- https://github.com/libp2p/rust-libp2p/commit/51ed5f00e1b0620ded3444ecadf18477052148eax-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.