What’s Vulnerable › Vulnerabilities

CVE-2026-4541: janmojzis tinyssh Ed25519 Signature crypto_sign_ed25519_tinyssh.c signature verification

• Severity: low (CVSS 2.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-22 · updated 2026-06-17
• Weakness: CWE-345

Description

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.

Affected products

• janmojzis tinyssh: 20250501

References

• 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
• https://vuldb.com/submit/774687
• https://vuldb.com/vuln/352358
• https://vuldb.com/vuln/352358/cti

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