JLSEC-2026-76 Medium 6.5

JLSEC-2026-76

JLSEC Published: Apr 9, 2026
Modified: Jul 17, 2026
Severity: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Affected Packages: OpenSSH_jll < 10.3.1+0
Upstream: CVE-2026-35387 EUVD-2026-18402

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.

References

https://marc.info/?l=openssh-unix-dev&m=177513443901484&w=2
https://nvd.nist.gov/vuln/detail/CVE-2026-35387
https://www.openssh.org/releasenotes.html#10.3p1
https://www.openwall.com/lists/oss-security/2026/04/02/3