CVE-2026-35457

libp2p-rust has unbounded rendezvous DISCOVER cookies enable remote memory exhaustion

HIGH
8.2
CVSS Score
Published: April 7, 2026 at 02:22 PM UTC
Updated: June 17, 2026 at 10:40 AM UTC
2 products affected across 2 vendorsLIBP2PLIBP2P

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Severity
HIGH8.2
Exploit prediction
EPSS 0.3%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 0.17.1
v < 0.17.1
Affected range stops below 0.17.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

x_refsource_CONFIRMExploitVendor Advisory
Source: cverecord
https://github.com/libp2p/rust-libp2p/security/advisories/GHSA-v5hw-cv9c-rpg7

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.2HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-770

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