CVE-2026-59999

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

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://marc.info/?l=openssh-unix-dev&m=178333966933090&w=2	Release Notes
https://www.openssh.org/releasenotes.html#10.4p1	Release Notes
https://www.openwall.com/lists/oss-security/2026/07/06/5	Mailing List Release Notes

Configurations

Configuration 1 (hide)

cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*

History

25 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) En sshd en OpenSSH anterior a 10.4, se suponía que DisableForwarding=yes tenía precedencia sobre PermitTunnel=yes, pero no fue así.

Information

Published : 2026-07-08 01:16

Updated : 2026-10-25 20:10

NVD link : CVE-2026-59999

Mitre link : CVE-2026-59999

CVE.ORG link : CVE-2026-59999

JSON object : View

Products Affected

openbsd

openssh

CWE

CWE-348

Use of Less Trusted Source

{"id": "CVE-2026-59999", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-59999", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-08T13:07:15.594672Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "cve@mitre.org", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.2}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "cve@mitre.org", "affectedData": [{"vendor": "OpenBSD", "product": "OpenSSH", "versions": [{"status": "affected", "version": "0", "lessThan": "10.4", "versionType": "custom"}], "defaultStatus": "unaffected"}]}], "published": "2026-07-08T01:16:29.010", "references": [{"url": "https://marc.info/?l=openssh-unix-dev&m=178333966933090&w=2", "tags": ["Release Notes"], "source": "cve@mitre.org"}, {"url": "https://www.openssh.org/releasenotes.html#10.4p1", "tags": ["Release Notes"], "source": "cve@mitre.org"}, {"url": "https://www.openwall.com/lists/oss-security/2026/07/06/5", "tags": ["Mailing List", "Release Notes"], "source": "cve@mitre.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "cve@mitre.org", "description": [{"lang": "en", "value": "CWE-348"}]}], "descriptions": [{"lang": "en", "value": "In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not."}, {"lang": "es", "value": "En sshd en OpenSSH anterior a 10.4, se supon\u00eda que DisableForwarding=yes ten\u00eda precedencia sobre PermitTunnel=yes, pero no fue as\u00ed."}], "lastModified": "2026-10-25T20:10:00.147", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "947E3B1E-F0DF-47BC-87D8-358B55B164AD", "versionEndExcluding": "10.4"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}