JLSEC-2026-1326 Critical 9.4

ssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key during a...

JLSEC Published: Aug 14, 2026
Modified: Aug 14, 2026
Severity: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Affected Packages: OpenSSH_jll < 10.4.1+0
Upstream: CVE-2026-60002 GHSA-gp5v-jg37-fvg6 EUVD-2026-42146

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.)

References

https://github.com/advisories/GHSA-gp5v-jg37-fvg6
https://marc.info/?l=openssh-unix-dev&m=178333966933090&w=2
https://nvd.nist.gov/vuln/detail/CVE-2026-60002
https://www.openssh.org/releasenotes.html#10.4p1
https://www.openwall.com/lists/oss-security/2026/07/06/5