{"answers":{"affected":"2 open source packages ship an affected version, including russh. It affects 2 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-42189 exists.","fix":"Upgrade russh to 0.60.1 or later.","what":"CVE-2026-42189 is a high-severity denial of service vulnerability in Eugeny russh, published on 8 May 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-2026-42189 and fix it if it is affected.\n\nWhat it is: CVE-2026-42189 is a high-severity denial of service vulnerability in Eugeny russh, published on 8 May 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-2026-42189 exists.\n\nAffected packages and fixed versions:\n- russh (crates.io): affected all versions; fixed in 0.60.1\n- russh (crates.io): affected all versions; fixed in 0.60.1\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-2026-42189/ (Markdown: https://insights.sbomify.com/CVE-2026-42189/index.md)","id":"CVE-2026-42189","markdown":"https://insights.sbomify.com/CVE-2026-42189/index.md","name":"CVE-2026-42189","record":{"aliases":["DEBIAN-CVE-2026-42189","GHSA-f5v4-2wr6-hqmg","UBUNTU-CVE-2026-42189"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Rust SSH library","requires_auth":"none","summary":"A malicious client can crash russh-based SSH servers via unbounded allocation in keyboard-interactive authentication without credentials.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"russh","vendor":"russh_project"},{"product":"warpgate","vendor":"warpgate_project"}],"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-789","name":"Memory Allocation with Excessive Size Value"},{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"Russh is a Rust SSH client \u0026 server library. Prior to version 0.60.1, a pre-authentication denial-of-service vulnerability exists in the server's keyboard-interactive authentication handler. A malicious client can crash any russh-based server that implements keyboard-interactive auth (e.g., for 2FA/TOTP) with a single malformed packet, requiring no credentials. This issue has been patched in version 0.60.1.","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":"Russh: Pre-auth DoS via unbounded allocation in keyboard-interactive auth","id":"CVE-2026-42189","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"crates.io","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"RedwoodSDK: Same-site CSRF in in server actions","id":"CVE-2026-42190"},"packages":[{"ecosystem":"crates.io","fixed":["0.60.1"],"introduced":["0"],"last_affected":[],"package":"russh","purl":null,"source":"GHSA-f5v4-2wr6-hqmg"},{"ecosystem":"crates.io","fixed":["0.60.1"],"introduced":["0"],"last_affected":[],"package":"russh","purl":"pkg:cargo/russh","source":"GHSA-f5v4-2wr6-hqmg"}],"prev":{"headline":"Geyser: Server-Side Request Forgery (SSRF) via Player Head Texture URL","id":"CVE-2026-42188"},"products":["russh"],"published":"2026-05-08","related":[{"cvss_score":7.5,"headline":"Russh has an OOM Denial of Service due to allocation of untrusted amount","id":"CVE-2024-43410","kev_date_added":null,"published":"2024-08-21"},{"cvss_score":6.5,"headline":"Russh is missing an overflow check during channel windows adjust","id":"CVE-2025-54804","kev_date_added":null,"published":"2025-08-05"},{"cvss_score":5.9,"headline":"russh may use insecure Diffie-Hellman keys","id":"CVE-2023-28113","kev_date_added":null,"published":"2023-03-16"}],"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":"2026-05-11","vendors":["Eugeny"]},"summary":"A malicious client can crash russh-based SSH servers via unbounded allocation in keyboard-interactive authentication without credentials.","url":"https://insights.sbomify.com/CVE-2026-42189/"}