CVE-2026-60002: 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.)

highCVSS 7.7CVE-2026-60002

CSIRTS triage

vendor: OpenSSH product: sshOtheraffected: before 10.4

What: ssh can have a use-after-free when a server changes its host key during a key re-exchange.
Who is affected: Deployments of OpenSSH ssh before version 10.4 are affected.
Urgency: Remediation is urgent due to the high severity and potential for exploitation.
Action: Upgrade OpenSSH to version 10.4 or later.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.7
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-60002

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-600020.30% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 22% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-60002	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownMultiple vulnerabilities in Microsoft Azure Linux (July 15, 2026)cert-fr-avis
unknownUSN-8533-1: OpenSSH vulnerabilitiesubuntu
highCVE-2026-60002: ssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key during…nvd

Recent advisories for ssh in OpenSSH

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

mediumCVE-2026-73282: In ssh in OpenSSH before 10.5, a use-after-free for realloc data can occur if a certain pair o…nvd · 2026-08-11
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lowCVE-2026-73281: In ssh-agent in OpenSSH before 10.5, some operations can occur remotely but were intended to o…msrc · 2026-08-11
mediumCVE-2026-73282: In ssh in OpenSSH before 10.5, a use-after-free for realloc data can occur if a certain pair o…msrc · 2026-08-11
highCVE-2026-56624: Improper certificate validation in Apache MINA SSHD (server-side). Apache MINA SSHD is a Java …nvd · 2026-07-20
highCVE-2026-47829: Argument Injection in bosh-cli allows a compromised BOSH Director to inject arbitrary OpenSSH …nvd · 2026-07-09