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Vulnerability record · CVE-2026-60002 · published 8 July 2026

CVE-2026-60002: Openbsd openssh use after free vulnerability

Openbsd · Openssh

ssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key during a key re-exchange. (This outcome occurs only on the client side.)

9.4 CVSS 3.1 Critical EPSS 0.47% · top 61.8% CWE-416 · Use after free
9.4CVSS 3.1 base score
0.47%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
9 Jul 2026Last modified by NVD

Description

ssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key during a key re-exchange. (This outcome occurs only on the client side.)

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

Affected products

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

References

LinkTags
https://marc.info/?l=openssh-unix-dev&m=178333966933090&w=2 Release Notes
https://www.openssh.org/releasenotes.html#10.4p1 Release Notes
https://www.openwall.com/lists/oss-security/2026/07/06/5 Mailing ListRelease Notes

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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%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%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%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%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%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%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%analysed9.8CVE-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%

Source: NIST National Vulnerability Database (record CVE-2026-60002), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.