Description
go-libp2p is the Go implementation of the libp2p Networking Stack. Prior to versions 0.27.8, 0.28.2, and 0.29.1 malicious peer can use large RSA keys to run a resource exhaustion attack & force a node to spend time doing signature verification of the large key. This vulnerability is present in the core/crypto module of go-libp2p and can occur during the Noise handshake and the libp2p x509 extension verification step. To prevent this attack, go-libp2p versions 0.27.8, 0.28.2, and 0.29.1 restrict RSA keys to <= 8192 bits. To protect one's application, it is necessary to update to these patch releases and to use the updated Go compiler in 1.20.7 or 1.19.12. There are no known workarounds for this issue.
Affected products
libp2p: go-libp2p
References10
- github.com/golang/go/issues/61460 Issue TrackingNot ApplicableVendor Advisory
- github.com/libp2p/go-libp2p/pull/2454 ExploitPatchVendor Advisory
- github.com/libp2p/go-libp2p/security/advisories/GHSA-876p-8259-… PatchVendor Advisory
- github.com/golang/go/issues/61460 Issue TrackingNot ApplicableVendor Advisory
- github.com/libp2p/go-libp2p/pull/2454 ExploitPatchVendor Advisory
- github.com/libp2p/go-libp2p/security/advisories/GHSA-876p-8259-… PatchVendor Advisory
- github.com/golang/go/commit/2350afd2e8ab054390e284c95d5b089c142… Not ApplicablePatch
- github.com/libp2p/go-libp2p/commit/0cce607219f3710addc7e18672cf… Patch
- github.com/libp2p/go-libp2p/commit/445be526aea4ee0b1fa5388aa65d… Patch
- github.com/libp2p/go-libp2p/commit/e30fcf7dfd4715ed89a5e68d7a4f… Patch
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 2% percentile: 75 · as of 5 November 2026
- CWE
- CWE-770
Could this be exploited in your environment?
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