{"answers":{"affected":"2 open source packages ship an affected version, including libp2p-rendezvous. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-35405 exists.","fix":"Upgrade libp2p-rendezvous to 0.17.1 or later.","what":"CVE-2026-35405 is a high-severity denial of service vulnerability in rust-libp2p, published on 7 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-35405 and fix it if it is affected.\n\nWhat it is: CVE-2026-35405 is a high-severity denial of service vulnerability in rust-libp2p, published on 7 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-35405 exists.\n\nAffected packages and fixed versions:\n- libp2p-rendezvous (crates.io): affected all versions; fixed in 0.17.1\n- libp2p-rendezvous (crates.io): affected all versions; fixed in 0.17.1\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-35405/ (Markdown: https://insights.sbomify.com/CVE-2026-35405/index.md)","id":"CVE-2026-35405","markdown":"https://insights.sbomify.com/CVE-2026-35405/index.md","name":"CVE-2026-35405","record":{"aliases":["GHSA-cqfx-gf56-8x59"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Rust libp2p library","requires_auth":"none","summary":"A malicious peer can exhaust server memory by registering unlimited namespaces, causing an out-of-memory denial of service in libp2p rendezvous servers.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"libp2p","vendor":"protocol"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"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.","ecosystems":["crates.io"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"libp2p-rendezvous: Unlimited namespace registrations per peer enables OOM DoS on rendezvous servers","id":"CVE-2026-35405","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"crates.io","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":2,"n_references":1,"next":{"headline":"Aardvark-dns has incorrect error handling for malformed tcp packets","id":"CVE-2026-35406"},"packages":[{"ecosystem":"crates.io","fixed":["0.17.1"],"introduced":["0"],"last_affected":[],"package":"libp2p-rendezvous","purl":null,"source":"GHSA-cqfx-gf56-8x59"},{"ecosystem":"crates.io","fixed":["0.17.1"],"introduced":["0"],"last_affected":[],"package":"libp2p-rendezvous","purl":"pkg:cargo/libp2p-rendezvous","source":"GHSA-cqfx-gf56-8x59"}],"prev":{"headline":"Open edX Platform has an Open Redirect in Survey Views via Unvalidated redirect_url Parameter","id":"CVE-2026-35404"},"products":["rust-libp2p"],"published":"2026-04-07","related":[{"cvss_score":8.2,"headline":"libp2p-rust has unbounded rendezvous DISCOVER cookies enable remote memory exhaustion","id":"CVE-2026-35457","kev_date_added":null,"published":"2026-04-07"},{"cvss_score":7.5,"headline":"libp2p nodes vulnerable to OOM attack","id":"CVE-2023-40583","kev_date_added":null,"published":"2023-08-25"},{"cvss_score":7.5,"headline":"go-libp2p denial of service vulnerability from lack of resource management","id":"CVE-2022-23492","kev_date_added":null,"published":"2022-12-08"},{"cvss_score":7.5,"headline":"libp2p-rust denial of service vulnerability from lack of resource management","id":"CVE-2022-23486","kev_date_added":null,"published":"2022-12-07"},{"cvss_score":7.5,"headline":"libp2p denial of service vulnerability from lack of resource management","id":"CVE-2022-23487","kev_date_added":null,"published":"2022-12-07"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-09","vendors":["libp2p"]},"summary":"A malicious peer can exhaust server memory by registering unlimited namespaces, causing an out-of-memory denial of service in libp2p rendezvous servers.","url":"https://insights.sbomify.com/CVE-2026-35405/"}