Home/CVE/A flaw has been found in janmojzis tinyssh up to 20250501. Impacted is an unknown function of the file tinyssh/crypto_si
CVE

CVE-2026-4541

A flaw has been found in janmojzis tinyssh up to 20250501. Impacted is an unknown function of the file tinyssh/crypto_si

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 issue. Patch name: 9c87269607e0d7d20174df742accc49c042cff17.

Upgrading the affected component is recommended.

LOW · CVSS 2.5 EPSS 2e-05
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-345Insufficient Verification of Data Authenticity
CWE-347Improper Verification of Cryptographic Signature
▣

Scoring & Timeline

2.5
LOW · CVSS v3.1 · cna@vuldb.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD22 Mar 2026 · 09:15 AM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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References & Sources

9
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/janmojzis/tinyssh/
https://github.com/janmojzis/tinyssh/commit/9c87269607e0d7d20174df742accc49c042cff17
https://github.com/janmojzis/tinyssh/issues/101
https://github.com/janmojzis/tinyssh/issues/101#issue-3983586116
https://github.com/janmojzis/tinyssh/pull/102
https://github.com/janmojzis/tinyssh/releases/tag/20260301
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