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-exchan

Q: How do I fix CVE-2026-60002?

openssh: upgrade to 10.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-60002 being exploited?

CVE-2026-60002 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-60002 affect?

CVE-2026-60002 affects openssh. Severity is high (CVSS 7.7). 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.)

Q: How urgent is CVE-2026-60002?

Priority 43/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

This month

HIGH 7.7REMOTEWATCHLISTUPGRADE

CVE-2026-60002 is a high-severity flaw (CVSS 7.7) affecting openssh. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.)

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.7 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-416
Published	2026-07-08
Last modified	2026-10-25

Publisher (CNA): MITRE · Vendor: openbsd

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-08 01:16 UTCPublished CVE record published
2026-10-25 20:10 UTCUpdated Record last modified

openbsd openssh UPGRADE

Affected: < 10.4

Fixed in: 10.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy openssh || rpm -q openssh || openssh --version

2. UPGRADE to 10.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade openssh

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade openssh

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-60002?

openssh: upgrade to 10.4. Exact commands for each OS are on this page.

Is CVE-2026-60002 being exploited?

CVE-2026-60002 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-60002 affect?

CVE-2026-60002 affects openssh. Severity is high (CVSS 7.7). 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.)

How urgent is CVE-2026-60002?

Priority 43/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

OpenSSH vulnerabilities

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References

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