CVE-2026-35405 json
libp2p-rendezvous: Unlimited namespace registrations per peer enables OOM DoS on rendezvous servers
published 2026-04-04 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-19649 , GHSA-cqfx-gf56-8x59
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 35%
- public exploits
- 0
- none known
Summary
libp2p-rust is the official rust language Implementation of the libp2p networking stack. Prior to 0.17.1, libp2p-rendezvous server has no limit on how many namespaces a single peer can register. A malicious peer can just keep registering unique namespaces in a loop and the server happily accepts every single one allocating memory for each registration with no pushback. Keep doing this long enough (or with multiple sybil peers) and the server process gets OOM killed. This vulnerability is fixed in 0.17.1.
Patch / fix
- crates.io libp2p-rendezvous 0.17.1
- libp2p libp2p 0.17.1
- protocol libp2p 0.17.1
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/libp2p/rust-libp2p/security/advisories/GHSA-cqfx-gf56-8x59 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | libp2p-rendezvous | <0.17.1 |
0.17.1 |
Affected products
- libp2p rust-libp2p
Classification
- Weakness
-
- CWE-770 Allocation of Resources Without Limits or Throttling
References
-
github.com
/libp2p/rust-libp2p/security/advisories/GHSA-cqfx-gf56-8x59
exploit, web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-35405
advisory
-
github.com
/libp2p/rust-libp2p
package
Sources
- CVE List CVE-2026-35405
- GitHub Advisory GHSA-cqfx-gf56-8x59
- NVD CVE-2026-35405
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.