CVE-2026-35457 json
libp2p-rust has unbounded rendezvous DISCOVER cookies enable remote memory exhaustion
published 7mo ago modified 4mo ago also EUVD-2026-19650 , GHSA-v5hw-cv9c-rpg7
- cvss
- 8.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 22%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- crates.io libp2p-rendezvous 0.17.1
- libp2p libp2p 0.17.1
- protocol libp2p 0.17.1
Is CVE-2026-35457 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 7mo ago
Exploit prediction
0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- github.com https://github.com/libp2p/rust-libp2p/security/advisories/GHSA-v5hw-cv9c-rpg7 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H |
| GitHub | 3.1 | 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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-v5hw-cv9c-rpg7
web, exploit, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-35457
advisory
-
github.com
/libp2p/rust-libp2p
package
Sources
- CVE List CVE-2026-35457
- GitHub Advisory GHSA-v5hw-cv9c-rpg7
- NVD CVE-2026-35457
Fencer Intel 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.