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CVE-2026-4541

A flaw has been found in janmojzis tinyssh up to 20250501. Impacted is an unknown function of the file tinyssh/crypto_sign_ed25519_tinyssh.c of the component Ed25519 Signature Handler. This manipulation causes improper verification of cryptographic signature. The attack is restricted to local execution. The attack's complexity is rated as high. The exploitability is considered difficult. The exploit has been published and may be used. Upgrading to version 20260301 is recommended to address this
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3ff7632ee84ccb929b6cf0a17e2bf801bc0a902363bf36fd9bb7bbce24380162
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 4 assertions

{"metric":{"baseScore":1,"vectorString":"AV:L/AC:H/Au:S/C:N/I:P/A:N/E:POC/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/metrics/3/cvssV2_0

{"metric":{"baseScore":2,"baseSeverity":"LOW","vectorString":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"baseScore":2.5,"baseSeverity":"LOW","vectorString":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C","version":"3.0"},"metric_type":"cvssV3_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/metrics/2/cvssV3_0

{"metric":{"baseScore":2.5,"baseSeverity":"LOW","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/metrics/1/cvssV3_1
cwe · 2 assertions

{"cweId":"CWE-345","description":"Insufficient Verification of Data Authenticity","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-347","description":"Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"modules":["Ed25519 Signature Handler"],"product":"tinyssh","vendor":"janmojzis","versions":[{"status":"affected","version":"20250501"},{"status":"unaffected","version":"20260301"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/affected/0

Provider-owned CVSS observations

4 source assertions
{"metric":{"baseScore":1,"vectorString":"AV:L/AC:H/Au:S/C:N/I:P/A:N/E:POC/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/metrics/3/cvssV2_0
{"metric":{"baseScore":2,"baseSeverity":"LOW","vectorString":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"baseScore":2.5,"baseSeverity":"LOW","vectorString":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/metrics/2/cvssV3_0
{"metric":{"baseScore":2.5,"baseSeverity":"LOW","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-345","description":"Insufficient Verification of Data Authenticity","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-347","description":"Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/problemTypes/0/descriptions/0

Source references

9 source assertions
{"tags":["product"],"url":"https://github.com/janmojzis/tinyssh/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/references/8
{"tags":["patch"],"url":"https://github.com/janmojzis/tinyssh/commit/9c87269607e0d7d20174df742accc49c042cff17"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/references/6
{"tags":["issue-tracking"],"url":"https://github.com/janmojzis/tinyssh/issues/101"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/references/3
{"tags":["exploit","issue-tracking"],"url":"https://github.com/janmojzis/tinyssh/issues/101#issue-3983586116"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/references/5
{"tags":["issue-tracking","patch"],"url":"https://github.com/janmojzis/tinyssh/pull/102"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/references/4
{"tags":["patch"],"url":"https://github.com/janmojzis/tinyssh/releases/tag/20260301"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/references/7
{"name":"Submit #774687 | GitHub tinyssh 20250501 Cryptographic Issues","tags":["third-party-advisory"],"url":"https://vuldb.com/submit/774687"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/references/2
{"name":"VDB-352358 | janmojzis tinyssh Ed25519 Signature crypto_sign_ed25519_tinyssh.c signature verification","tags":["vdb-entry"],"url":"https://vuldb.com/vuln/352358"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/references/0
{"name":"VDB-352358 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"],"url":"https://vuldb.com/vuln/352358/cti"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9601aeb7d9c0c7dee07e5adc78de921baf3a7a2cba8d095f0b67968225ffe3ea · sha256:0e552123123e9ccd… · /containers/cna/references/1

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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