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CVE-2026-48108

Russh is a Rust SSH client & server library. From version 0.34.0-beta.1 to before version 0.61.0, russh did not enforce the SSH identification-string rules as deliberately as OpenSSH. In particular, the server-side identification reader used the same permissive path as the client, allowing pre-banner lines from clients, and the reader did not enforce a bounded number of pre-banner lines. For a library server built on russh, this could allow a remote peer to hold connection setup resources in the
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:337f284eea3d269bc90951d1c8ecbacc97a327f05c990dcf1c9a6638af11f895
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"russh","vendor":"Eugeny","versions":[{"status":"affected","version":">= 0.34.0-beta.1, < 0.61.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6691bf672c982a53f5f8a27eba47177bacfe245d5d5a50dc66f7808621cd6f8c · sha256:be83302613ecc230… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","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:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6691bf672c982a53f5f8a27eba47177bacfe245d5d5a50dc66f7808621cd6f8c · sha256:be83302613ecc230… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6691bf672c982a53f5f8a27eba47177bacfe245d5d5a50dc66f7808621cd6f8c · sha256:be83302613ecc230… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-76r6-x97p-67vr"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6691bf672c982a53f5f8a27eba47177bacfe245d5d5a50dc66f7808621cd6f8c · sha256:be83302613ecc230… · /containers/adp/0/references/0
{"name":"https://github.com/Eugeny/russh/security/advisories/GHSA-76r6-x97p-67vr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-76r6-x97p-67vr"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6691bf672c982a53f5f8a27eba47177bacfe245d5d5a50dc66f7808621cd6f8c · sha256:be83302613ecc230… · /containers/cna/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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