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MEDIUM

CVE-2026-59997

CVSS v3

4.2

MEDIUM

EPSS Score

0.2 %

exploit probability, as of 2026-10-22

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • opensshAlmaLinux:10all versions · fixed in 9.9p1-29.el10_2.alma.1and 5 other packages
  • opensshAlmaLinux:9all versions · fixed in 9.9p1-13.el9_8.alma.1and 4 other packages
  • pam_ssh_agent_authAlmaLinux:9all versions · fixed in 0.10.4-8.13.el9_8.alma.1

Vendor advisories

  • CVE-2026-59997 Red Hat Product Security193 products fixed · 28 known affected

    openssh: OpenSSH: SFTP security bypass due to command-line argument parsing flaw

    openssh as a component of Red Hat Enterprise Linux 6 · openssh-askpass as a component of Red Hat Enterprise Linux 6 · openssh-clients as a component of Red Hat Enterprise Linux 6

  • RHSA-2026:85958 Red Hat Product Security89 products fixed

    Red Hat Security Advisory: openssh security update

  • RHSA-2026:85847 Red Hat Product Security89 products fixed

    Red Hat Security Advisory: openssh security update

  • RHSA-2026:37382 Red Hat Product Security15 products fixed

    Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Full record on NVD

Description

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.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Published
2026-07-08
Last Modified
2026-07-08

Frequently asked questions

What is 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.

Is CVE-2026-59997 actively exploited?

Active exploitation of CVE-2026-59997 has not been confirmed. Its EPSS score was 0.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-59997?

CVE-2026-59997 has a CVSS v3 base score of 4.2 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N.

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