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Multiples vulnérabilités dans OpenSSH (07 octobre 2026)

De multiples vulnérabilités ont été découvertes dans OpenSSH. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, une élévation de privilèges et une atteinte à la confidentialité des données.

OpenSSH FR

tg: zranitelnost

7. 10. 2026 · zachyceno 16:00 · CERT-FR – avis · Multiples vulnérabilités dans OpenSSH (07 octobre 2026)

CVE-2026-59998 sshd in OpenSSH before 10.4 has an undocumented security-relevant behavior: GSSAPIStrictAcceptorCheck has no value if the server is in Windows Active Directory.

Information published.

EPSS < 0.01 CVE-2026-59998 OpenSSH US

11. 7. 2026 · Microsoft Security · CVE-2026-59998 sshd in OpenSSH before 10.4 has an undocumented security-relevant behavior: GSSAPIStrictAcceptorCheck has no value if the server is in Windows Active Directory.

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.)

Information published.

EPSS < 0.01 CVE-2026-60002 OpenSSH US

9. 7. 2026 · Microsoft Security · 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.)

CVE-2026-59999 In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not.

Information published.

EPSS < 0.01 CVE-2026-59999 OpenSSH US

9. 7. 2026 · Microsoft Security · CVE-2026-59999 In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not.

CVE-2026-60000 sshd in OpenSSH before 10.4 allows remote attackers to cause a denial of service (resource consumption from excessive authentication attempts) because MaxAuthTries was mishandled for GSSAPIAuthentication.

Information published.

EPSS 0.01 CVE-2026-60000 OpenSSH US

9. 7. 2026 · Microsoft Security · CVE-2026-60000 sshd in OpenSSH before 10.4 allows remote attackers to cause a denial of service (resource consumption from excessive authentication attempts) because MaxAuthTries was mishandled for GSSAPIAuthentication.

CVE-2026-60001 sshd in OpenSSH before 10.4 does not always honor the minimum authentication delay.

Information published.

EPSS < 0.01 CVE-2026-60001 OpenSSH US

9. 7. 2026 · Microsoft Security · CVE-2026-60001 sshd in OpenSSH before 10.4 does not always honor the minimum authentication delay.

CVE-2026-59995 sftp in OpenSSH before 10.4 does not properly constrain the location of downloaded files when "sftp server:/path ." is used with an attacker-controlled server.

Information published.

EPSS < 0.01 CVE-2026-59995 OpenSSH US

9. 7. 2026 · Microsoft Security · CVE-2026-59995 sftp in OpenSSH before 10.4 does not properly constrain the location of downloaded files when "sftp server:/path ." is used with an attacker-controlled server.

CVE-2026-59996 scp in OpenSSH before 10.4 may place a file in the parent directory of an intended directory when the copy occurs between two remote destinations.

Information published.

EPSS < 0.01 CVE-2026-59996 OpenSSH US

9. 7. 2026 · Microsoft Security · CVE-2026-59996 scp in OpenSSH before 10.4 may place a file in the parent directory of an intended directory when the copy occurs between two remote destinations.

CVE-2026-59997 internal-sftp in sshd in OpenSSH before 10.4 recognizes only the first 9 command-line arguments, which can be important if a later command-line argument would have helped to ensure the intended security properties of an SFTP connection.

Information published.

EPSS < 0.01 CVE-2026-59997 OpenSSH US

9. 7. 2026 · Microsoft Security · CVE-2026-59997 internal-sftp in sshd in OpenSSH before 10.4 recognizes only the first 9 command-line arguments, which can be important if a later command-line argument would have helped to ensure the intended security properties of an SFTP connection.

CVE-2026-35387 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.

Information published.

EPSS < 0.01 CVE-2026-35387 OpenSSH US

4. 4. 2026 · Microsoft Security · CVE-2026-35387 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.

CVE-2026-35414 OpenSSH before 10.3 mishandles the authorized_keys principals option in uncommon scenarios involving a principals list in conjunction with a Certificate Authority that makes certain use of comma characters.

Information published.

EPSS < 0.01 CVE-2026-35414 OpenSSH US

4. 4. 2026 · Microsoft Security · CVE-2026-35414 OpenSSH before 10.3 mishandles the authorized_keys principals option in uncommon scenarios involving a principals list in conjunction with a Certificate Authority that makes certain use of comma characters.