Improper Verification of Cryptographic Signature Affecting janmojzis/tinyssh package, versions [20250501,20260301)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-JANMOJZISTINYSSH-15857078
- published31 Mar 2026
- disclosed22 Mar 2026
- creditpythok
Introduced: 22 Mar 2026
CVE-2026-4541 (opens in a new tab)How to fix?
Upgrade janmojzis/tinyssh to version 20260301 or higher.
Overview
Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature in the Ed25519 Signature Handler process. An attacker can bypass cryptographic signature verification by providing specially crafted signatures. This is only exploitable if the attacker has local access and the ability to supply malicious signatures to the affected process.