CVE-2026-35387 Details
Description
OpenSSH before 10.3 can use unintended ECDSA algorithms. Listing of any ECDSA algorithm in PubkeyAcceptedAlgorithms or HostbasedAcceptedAlgorithms is misinterpreted to mean all ECDSA algorithms.
A vulnerability exists in OpenSSH versions prior to 10.3, where the handling of ECDSA algorithms in the PubkeyAcceptedAlgorithms and HostbasedAcceptedAlgorithms directives is flawed. If any ECDSA algorithm is listed, it is incorrectly interpreted to allow all ECDSA algorithms, leading to potential authentication issues.
Users can upgrade to OpenSSH version 10.3 or later, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 3, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://marc.info/?l=openssh-unix-dev&m=177513443901484&w=2 | [email protected] | Third Party Advisory |
| https://www.openssh.org/releasenotes.html#10.3p1 | [email protected] | Release Notes |
| https://www.openwall.com/lists/oss-security/2026/04/02/3 | [email protected] | Third Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-670 | Always-Incorrect Control Flow Implementation | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| openbsd openssh | < 10.3 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 27, 2026 | Initial Analysis | [email protected] |
| Apr 2, 2026 | New CVE Received | [email protected] |