CVE-2026-35387
ECDSA Algorithm Misinterpretation Vulnerability in OpenSSH Before
Publication date: 2026-04-02
Last updated on: 2026-04-27
Assigner: MITRE
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| openbsd | openssh | to 10.3 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-670 | The code contains a control flow path that does not reflect the algorithm that the path is intended to implement, leading to incorrect behavior any time this path is navigated. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability affects OpenSSH versions before 10.3, where the software can mistakenly use unintended ECDSA algorithms. Specifically, if any ECDSA algorithm is listed in the configuration options PubkeyAcceptedAlgorithms or HostbasedAcceptedAlgorithms, OpenSSH misinterprets this to mean that all ECDSA algorithms are accepted.
How can this vulnerability impact me? :
The impact of this vulnerability is limited but notable. Because OpenSSH may accept all ECDSA algorithms when only some were intended, it could lead to the use of weaker or unintended cryptographic algorithms. According to the CVSS score, the impact on integrity is low, with no impact on confidentiality or availability.