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CVE-2026-42189

Russh is a Rust SSH client & 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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:171edeb8ea87272fb951dfadca09c23688815a5716f4ab29288d45d1c5d67edf
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6a185e7b405b570182f1613b07101a10da63e287a823c1528ba4c4e13e78e1a5 · sha256:ecad1c334010350b… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-789","description":"CWE-789: Memory Allocation with Excessive Size Value","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6a185e7b405b570182f1613b07101a10da63e287a823c1528ba4c4e13e78e1a5 · sha256:ecad1c334010350b… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"russh","vendor":"Eugeny","versions":[{"status":"affected","version":"< 0.60.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6a185e7b405b570182f1613b07101a10da63e287a823c1528ba4c4e13e78e1a5 · sha256:ecad1c334010350b… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6a185e7b405b570182f1613b07101a10da63e287a823c1528ba4c4e13e78e1a5 · sha256:ecad1c334010350b… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6a185e7b405b570182f1613b07101a10da63e287a823c1528ba4c4e13e78e1a5 · sha256:ecad1c334010350b… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-789","description":"CWE-789: Memory Allocation with Excessive Size Value","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6a185e7b405b570182f1613b07101a10da63e287a823c1528ba4c4e13e78e1a5 · sha256:ecad1c334010350b… · /containers/cna/problemTypes/1/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/Eugeny/russh/commit/6c3c80a9b6d60763d6227d60fa8310e57172a4d1","tags":["x_refsource_MISC"],"url":"https://github.com/Eugeny/russh/commit/6c3c80a9b6d60763d6227d60fa8310e57172a4d1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6a185e7b405b570182f1613b07101a10da63e287a823c1528ba4c4e13e78e1a5 · sha256:ecad1c334010350b… · /containers/cna/references/1
{"name":"https://github.com/Eugeny/russh/releases/tag/v0.60.1","tags":["x_refsource_MISC"],"url":"https://github.com/Eugeny/russh/releases/tag/v0.60.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6a185e7b405b570182f1613b07101a10da63e287a823c1528ba4c4e13e78e1a5 · sha256:ecad1c334010350b… · /containers/cna/references/2
{"name":"https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg","tags":["x_refsource_CONFIRM"],"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6a185e7b405b570182f1613b07101a10da63e287a823c1528ba4c4e13e78e1a5 · sha256:ecad1c334010350b… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-f5v4-2wr6-hqmg"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6a185e7b405b570182f1613b07101a10da63e287a823c1528ba4c4e13e78e1a5 · sha256:ecad1c334010350b… · /containers/adp/0/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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