PT-2026-26972 · Janmojzis · Tinyssh

Pythok · Published 2026-03-22 · Updated 2026-03-22 · CVE-2026-4541

Mitre

CVSS v3.1

2.5

Low

AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N

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. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Exploit

Fix

Improper Verification of Cryptographic Signature

Insufficient Verification of Data Authenticity

Weakness Enumeration

CWE-347

CWE-345

Related Identifiers

CVE-2026-4541

Affected Products

Tinyssh

References · 10

• 🔥 https://github.com/janmojzis/tinyssh/issues/101#issue-3983586116 · Exploit
• https://github.com/janmojzis/tinyssh/pull/102 · Patch
• https://github.com/janmojzis/tinyssh/commit/9c87269607e0d7d20174df742accc49c042cff17 · Patch
• https://github.com/janmojzis/tinyssh/releases/tag/20260301 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-4541 · Security Note
• https://github.com/janmojzis/tinyssh/issues/101 · Note
• https://vuldb.com/?submit.774687 · Note
• https://github.com/janmojzis/tinyssh · Note
• https://vuldb.com/?id.352358 · Note
• https://vuldb.com/?ctiid.352358 · Note