High severity · published Apr 7, 2026
CVE-2026-35457
libp2p-rust has unbounded rendezvous DISCOVER cookies enable remote memory exhaustion
8.2
CVSS
0.3%
EPSS
No
On KEV
Description
libp2p-rust is the official rust language Implementation of the libp2p networking stack. Prior to 0.17.1, the rendezvous server stores pagination cookies without bounds. An unauthenticated peer can repeatedly issue DISCOVER requests and force unbounded memory growth. This vulnerability is fixed in 0.17.1.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RU
rust-libp2p · libp2p
< 0.17.1 · source: vendor
LI
Libp2p · Protocol
before 0.17.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35457
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-35457
Exploit
https://github.com/libp2p/rust-libp2p/security/advisories/GHSA-v5hw-cv9c-rpg7
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