Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-54590

AsyncSSH is a Python package which provides an asynchronous client and server implementation of the SSHv2 protocol on top of the Python asyncio framework. Version 2.23.0 contains an incomplete fix for CVE-2026-45309 in SSHServerConfig._set_tokens that blocks /, , and .. before %u substitution in AuthorizedKeysFile but does not block a leading ~ or ${ENV}, allowing later expansion in _expand_val and Path(filename).expanduser() to escape the intended authorized-keys directory. This issue is fixed
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:288b9da7e1add901578dafa7bc52612c2f56f7dc87d99aca417f899d9ef96ddf
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-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ac3231054ed41071b68779ed1ec370efe1076342b1860144ed175713d04f47ae · sha256:82168c9b752ae01b… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ac3231054ed41071b68779ed1ec370efe1076342b1860144ed175713d04f47ae · sha256:82168c9b752ae01b… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"asyncssh","vendor":"ronf","versions":[{"status":"affected","version":"< 2.23.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ac3231054ed41071b68779ed1ec370efe1076342b1860144ed175713d04f47ae · sha256:82168c9b752ae01b… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ac3231054ed41071b68779ed1ec370efe1076342b1860144ed175713d04f47ae · sha256:82168c9b752ae01b… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ac3231054ed41071b68779ed1ec370efe1076342b1860144ed175713d04f47ae · sha256:82168c9b752ae01b… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ac3231054ed41071b68779ed1ec370efe1076342b1860144ed175713d04f47ae · sha256:82168c9b752ae01b… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/ronf/asyncssh/commit/3d515ba9ba0cd9990d248bdf62bcf05d51261a88","tags":["x_refsource_MISC"],"url":"https://github.com/ronf/asyncssh/commit/3d515ba9ba0cd9990d248bdf62bcf05d51261a88"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ac3231054ed41071b68779ed1ec370efe1076342b1860144ed175713d04f47ae · sha256:82168c9b752ae01b… · /containers/cna/references/1
{"name":"https://github.com/ronf/asyncssh/releases/tag/v2.23.1","tags":["x_refsource_MISC"],"url":"https://github.com/ronf/asyncssh/releases/tag/v2.23.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ac3231054ed41071b68779ed1ec370efe1076342b1860144ed175713d04f47ae · sha256:82168c9b752ae01b… · /containers/cna/references/2
{"name":"https://github.com/ronf/asyncssh/security/advisories/GHSA-qr67-gv47-xwwh","tags":["x_refsource_CONFIRM"],"url":"https://github.com/ronf/asyncssh/security/advisories/GHSA-qr67-gv47-xwwh"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ac3231054ed41071b68779ed1ec370efe1076342b1860144ed175713d04f47ae · sha256:82168c9b752ae01b… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/ronf/asyncssh/security/advisories/GHSA-qr67-gv47-xwwh"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ac3231054ed41071b68779ed1ec370efe1076342b1860144ed175713d04f47ae · sha256:82168c9b752ae01b… · /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.

← Back to CVE Explorer