CVE-2026-35405: CWE-770: Allocation of Resources Without Limits or Throttling in libp2p rust-libp2p
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.
AI Analysis
Technical Summary
The vulnerability in rust-libp2p (CVE-2026-35405) involves the libp2p-rendezvous server accepting unlimited namespace registrations from a single peer without any throttling or resource limits. This allows a malicious actor to exhaust server memory by continuously registering new namespaces, resulting in denial of service through OOM termination. The flaw is categorized under CWE-770 (Allocation of Resources Without Limits or Throttling). It affects versions prior to 0.17.1 and has a CVSS 3.1 base score of 7.5, indicating high severity. The vulnerability has been addressed in rust-libp2p version 0.17.1.
Potential Impact
Exploitation of this vulnerability can cause a denial of service by exhausting the server's memory resources, leading to the server process being killed due to out-of-memory conditions. There is no impact on confidentiality or integrity reported. No known exploits in the wild have been documented.
Mitigation Recommendations
Upgrade rust-libp2p to version 0.17.1 or later, where this vulnerability is fixed. Since the vendor advisory confirms the fix in 0.17.1, applying this official update is the recommended remediation. Patch status is confirmed by the vendor advisory. No additional mitigations are specified.
CVE-2026-35405: CWE-770: Allocation of Resources Without Limits or Throttling in libp2p rust-libp2p
Description
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in rust-libp2p (CVE-2026-35405) involves the libp2p-rendezvous server accepting unlimited namespace registrations from a single peer without any throttling or resource limits. This allows a malicious actor to exhaust server memory by continuously registering new namespaces, resulting in denial of service through OOM termination. The flaw is categorized under CWE-770 (Allocation of Resources Without Limits or Throttling). It affects versions prior to 0.17.1 and has a CVSS 3.1 base score of 7.5, indicating high severity. The vulnerability has been addressed in rust-libp2p version 0.17.1.
Potential Impact
Exploitation of this vulnerability can cause a denial of service by exhausting the server's memory resources, leading to the server process being killed due to out-of-memory conditions. There is no impact on confidentiality or integrity reported. No known exploits in the wild have been documented.
Mitigation Recommendations
Upgrade rust-libp2p to version 0.17.1 or later, where this vulnerability is fixed. Since the vendor advisory confirms the fix in 0.17.1, applying this official update is the recommended remediation. Patch status is confirmed by the vendor advisory. No additional mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-02T17:03:42.075Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d51c3baaed68159a2c14ef
Added to database: 4/7/2026, 3:01:15 PM
Last enriched: 4/7/2026, 3:16:36 PM
Last updated: 4/8/2026, 2:06:52 AM
Views: 4
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