Vulnerability-Lookup

OESA-2026-3349 (CVE-2026-59995)

Vulnerability from osv_openeuler – Published: 2026-08-13 14:00 – Updated: 2026-08-13 14:00 – Source website

Summary

openssh security update

Details

An open source implementation of SSH protocol version 2

Security Fix(es):

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-2026-59995)

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-2026-59997)

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

Severity

7.5 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-59995	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-59997	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-59999	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "openssh-8.2p1-39.oe2003sp4.aarch64.rpm",
          "openssh-askpass-8.2p1-39.oe2003sp4.aarch64.rpm",
          "openssh-cavs-8.2p1-39.oe2003sp4.aarch64.rpm",
          "openssh-clients-8.2p1-39.oe2003sp4.aarch64.rpm",
          "openssh-debuginfo-8.2p1-39.oe2003sp4.aarch64.rpm",
          "openssh-debugsource-8.2p1-39.oe2003sp4.aarch64.rpm",
          "openssh-keycat-8.2p1-39.oe2003sp4.aarch64.rpm",
          "openssh-ldap-8.2p1-39.oe2003sp4.aarch64.rpm",
          "openssh-server-8.2p1-39.oe2003sp4.aarch64.rpm",
          "pam_ssh_agent_auth-0.10.3-9.39.oe2003sp4.aarch64.rpm"
        ],
        "noarch": [
          "openssh-help-8.2p1-39.oe2003sp4.noarch.rpm"
        ],
        "src": [
          "openssh-8.2p1-39.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "openssh-8.2p1-39.oe2003sp4.x86_64.rpm",
          "openssh-askpass-8.2p1-39.oe2003sp4.x86_64.rpm",
          "openssh-cavs-8.2p1-39.oe2003sp4.x86_64.rpm",
          "openssh-clients-8.2p1-39.oe2003sp4.x86_64.rpm",
          "openssh-debuginfo-8.2p1-39.oe2003sp4.x86_64.rpm",
          "openssh-debugsource-8.2p1-39.oe2003sp4.x86_64.rpm",
          "openssh-keycat-8.2p1-39.oe2003sp4.x86_64.rpm",
          "openssh-ldap-8.2p1-39.oe2003sp4.x86_64.rpm",
          "openssh-server-8.2p1-39.oe2003sp4.x86_64.rpm",
          "pam_ssh_agent_auth-0.10.3-9.39.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "openssh",
        "purl": "pkg:rpm/openEuler/openssh\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.2p1-39.oe2003sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "An open source implementation of SSH protocol version 2\r\n\r\nSecurity Fix(es):\n\nsftp in OpenSSH before 10.4 does not properly constrain the location of downloaded files when \u0026quot;sftp server:/path .\u0026quot; is used with an attacker-controlled server.(CVE-2026-59995)\n\ninternal-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-2026-59997)\n\nIn sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not.(CVE-2026-59999)",
  "id": "OESA-2026-3349",
  "modified": "2026-08-13T14:00:19Z",
  "published": "2026-08-13T14:00:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3349"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59995"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59997"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59999"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "openssh security update",
  "upstream": [
    "CVE-2026-59995",
    "CVE-2026-59997",
    "CVE-2026-59999"
  ]
}

CVE-2026-59995 (GCVE-0-2026-59995)

Vulnerability from cvelistv5 – Published: 2026-07-08 00:04 – Updated: 2026-07-08 12:52

Summary

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.

Severity

4.2 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-08 12:52 UTC

CWE

CWE-23 - Relative Path Traversal

Assigner

mitre mitre root

References

3 references

URL	Tags
https://www.openwall.com/lists/oss-security/2026/…
https://marc.info/?l=openssh-unix-dev&m=178333966…
https://www.openssh.org/releasenotes.html#10.4p1

Impacted products

1 product

Vendor	Product	Version
OpenBSD	OpenSSH	Affected: 0 , < 10.4 (custom) cpe:2.3:a:openbsd:openssh::::::::

Show details on NVD website

JSON

To clipboard

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CVE-2026-59997 (GCVE-0-2026-59997)

Vulnerability from cvelistv5 – Published: 2026-07-08 00:09 – Updated: 2026-07-08 12:52

Summary

Severity

4.2 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-08 12:52 UTC

CWE

CWE-1284 - Improper Validation of Specified Quantity in Input

Assigner

mitre mitre root

References

3 references

URL	Tags
https://www.openwall.com/lists/oss-security/2026/…
https://marc.info/?l=openssh-unix-dev&m=178333966…
https://www.openssh.org/releasenotes.html#10.4p1

Impacted products

1 product

Vendor	Product	Version
OpenBSD	OpenSSH	Affected: 0 , < 10.4 (custom) cpe:2.3:a:openbsd:openssh::::::::

Show details on NVD website

JSON

To clipboard

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CVE-2026-59999 (GCVE-0-2026-59999)

Vulnerability from cvelistv5 – Published: 2026-07-08 00:13 – Updated: 2026-07-08 13:07

Summary

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

Severity

5.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-08 13:07 UTC

CWE

CWE-348 - Use of Less Trusted Source

Assigner

mitre mitre root

References

3 references

URL	Tags
https://www.openwall.com/lists/oss-security/2026/…
https://marc.info/?l=openssh-unix-dev&m=178333966…
https://www.openssh.org/releasenotes.html#10.4p1

Impacted products

1 product

Vendor	Product	Version
OpenBSD	OpenSSH	Affected: 0 , < 10.4 (custom) cpe:2.3:a:openbsd:openssh::::::::

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

OESA-2026-3349 (CVE-2026-59995)

CVE-2026-59995 (GCVE-0-2026-59995)

CVE-2026-59997 (GCVE-0-2026-59997)

CVE-2026-59999 (GCVE-0-2026-59999)

Tags

Sightings

Nomenclature

Related by attack behaviour