GHSA-v5hw-cv9c-rpg7

Source

https://github.com/advisories/GHSA-v5hw-cv9c-rpg7

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-v5hw-cv9c-rpg7/GHSA-v5hw-cv9c-rpg7.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-v5hw-cv9c-rpg7

Aliases

CVE-2026-35457

Published

2026-04-04T06:34:29Z

Modified

2026-04-07T20:21:43.969674Z

Severity

8.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H CVSS Calculator

Summary

libp2p-rendezvous: Unbounded rendezvous DISCOVER cookies enable remote memory exhaustion

Details

Summary

The rendezvous server stores pagination cookies without bounds. An unauthenticated peer can repeatedly issue DISCOVER requests and force unbounded memory growth.

Details

Pagination state is stored in:

HashMap<Cookie, HashSet<RegistrationId>>

On Message::Discover:

remote peer
→ DISCOVER
→ handle_request
→ registrations.get(...)
→ new cookie generated
→ cookie inserted into Registrations::cookies

There is no upper bound or eviction policy, so repeated DISCOVER requests grow this map indefinitely.

PoC

A reproduction test and minimal harness will be provided in a private fork in a follow-up comment.

Impact

Remote state amplification leading to memory exhaustion.

Properties:

etwork reachable
no authentication required
low attack complexity
protocol-compliant traffic

Impacts rendezvous nodes exposed to untrusted peers.

Possible Fixes

Global cap + eviction

Bound cookie storage (MAX_COOKIES_TRACKED) with FIFO/expiry aware eviction.
Tradeoff: attacker can churn cookies and evict legitimate pagination state.

Stateless cookies

Encode pagination state in authenticated cookies instead of storing server-side state.
Tradeoff: more complex implementation.

Rate limiting / per-peer quotas

Limit cookie creation per peer.
Tradeoff: requires peer tracking.

Database specific

{
    "nvd_published_at": "2026-04-07T15:17:43Z",
    "severity": "HIGH",
    "github_reviewed": true,
    "cwe_ids": [
        "CWE-770"
    ],
    "github_reviewed_at": "2026-04-04T06:34:29Z"
}

References

Affected packages

crates.io / libp2p-rendezvous

Package

Name: libp2p-rendezvous; View open source insights on deps.dev
Purl: pkg:cargo/libp2p-rendezvous

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.17.1

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-v5hw-cv9c-rpg7/GHSA-v5hw-cv9c-rpg7.json"