Vulnerability record · CVE-2026-35387 · published 2 April 2026

CVE-2026-35387: Openbsd openssh vulnerability

Openbsd · Openssh

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.

6.5 CVSS 3.1 Medium EPSS 0.50% · top 59.9% CWE-670 · CWE-670

6.5CVSS 3.1 base score

0.50%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

3References

24 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Openssh Openbsd

References

Link	Tags
https://marc.info/?l=openssh-unix-dev&m=177513443901484&w=2	Third Party Advisory
https://www.openssh.org/releasenotes.html#10.3p1	Release Notes
https://www.openwall.com/lists/oss-security/2026/04/02/3	Third Party Advisory

Track CVE-2026-35387 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2003-0786Openbsd openssh vulnerabilityThe SSH1 PAM challenge response authentication in OpenSSH 3.7.1 and 3.7.1p1, when Privilege Separation is disabled, does not check the result of the …EPSS 3.6%17 Nov 2003 10.0CVE-2003-0693Openbsd openssh vulnerabilityA "buffer management error" in buffer_append_space of buffer.c for OpenSSH before 3.7 may allow remote attackers to execute arbitrary code by causing…EPSS 11%22 Sep 2003 10.0CVE-2002-0640Openbsd openssh vulnerabilityBuffer overflow in sshd in OpenSSH 2.3.1 through 3.3 may allow remote attackers to execute arbitrary code via a large number of responses during chal…EPSS 27%3 Jul 2002 10.0CVE-2001-0144Openbsd openssh vulnerabilityCORE SDI SSH1 CRC-32 compensation attack detector allows remote attackers to execute arbitrary commands on an SSH server or client via an integer ove…EPSS 32%12 Mar 2001 10.0CVE-2000-0999Openbsd openssh vulnerabilityFormat string vulnerabilities in OpenBSD ssh program (and possibly other BSD-based operating systems) allow attackers to gain root privileges.EPSS 12%11 Dec 2000 10.0CVE-2000-0525Openbsd openssh vulnerabilityOpenSSH does not properly drop privileges when the UseLogin option is enabled, which allows local users to execute arbitrary commands by providing th…EPSS 2.6%8 Jun 2000 9.8CVE-2023-38408OpenSSH ssh-agent PKCS#11 search path flaw enables RCE via agent forwardingThe PKCS#11 support in ssh-agent in OpenSSH before 9.3p2 uses an insufficiently trustworthy search path, so code loaded from locations such as /usr/l…EPSS 80%analysed20 Jul 2023 9.8CVE-2023-28531Openbsd openssh improper access control vulnerabilityssh-add in OpenSSH before 9.3 adds smartcard keys to ssh-agent without the intended per-hop destination constraints. The earliest affected version is…EPSS 2.3%17 Mar 2023

Source: NIST National Vulnerability Database (record CVE-2026-35387), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.