CVE-2026-35414 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Openbsd	Openssh

No data.

No data.

No data.

References

Link	Providers
https://marc.info/?l=openssh-unix-dev&m=177513443901484&w=2
https://www.openssh.org/releasenotes.html#10.3p1
https://www.openwall.com/lists/oss-security/2026/04/02/3

History

Thu, 02 Apr 2026 20:30:00 +0000

Type	Values Removed	Values Added
Description		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.
First Time appeared		Openbsd Openbsd openssh
Weaknesses		CWE-670
CPEs		cpe:2.3:a:openbsd:openssh::::::::
Vendors & Products		Openbsd Openbsd openssh
References		https://marc.info/?l=openssh-unix-dev&m=177513443901484&w=2 https://www.openssh.org/releasenotes.html#10.3p1 https://www.openwall.com/lists/oss-security/2026/04/02/3
Metrics		cvssV3_1 `{'score': 4.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-04-02T17:08:15.628Z

Updated: 2026-04-02T18:17:04.391Z

Reserved: 2026-04-02T17:08:15.208Z

Link: CVE-2026-35414

Vulnrichment

Updated: 2026-04-02T17:43:15.738Z

NVD

Status : Received

Published: 2026-04-02T18:16:34.690

Modified: 2026-04-02T18:16:34.690

Link: CVE-2026-35414

Redhat

No data.

OpenCVE Enrichment

No data.

{"dataType": "CVE_RECORD", "cveMetadata": {"cveId": "CVE-2026-35414", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "state": "PUBLISHED", "assignerShortName": "mitre", "dateReserved": "2026-04-02T17:08:15.208Z", "datePublished": "2026-04-02T17:08:15.628Z", "dateUpdated": "2026-04-02T18:17:04.391Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "OpenSSH", "vendor": "OpenBSD", "versions": [{"lessThan": "10.3", "status": "affected", "version": "0", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "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."}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.2, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-670", "description": "CWE-670 Always-Incorrect Control Flow Implementation", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-04-02T18:17:04.391Z"}, "references": [{"url": "https://www.openssh.org/releasenotes.html#10.3p1"}, {"url": "https://marc.info/?l=openssh-unix-dev&m=177513443901484&w=2"}, {"url": "https://www.openwall.com/lists/oss-security/2026/04/02/3"}], "x_generator": {"engine": "CVE-Request-form 0.0.1"}, "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.3"}]}]}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-02T17:42:45.278974Z", "id": "CVE-2026-35414", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-02T17:43:24.725Z"}}]}, "dataVersion": "5.2"}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-35414", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-02T17:42:45.278974Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-02T17:43:15.738Z"}}], "cna": {"metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.2, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "OpenBSD", "product": "OpenSSH", "versions": [{"status": "affected", "version": "0", "lessThan": "10.3", "versionType": "custom"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://www.openssh.org/releasenotes.html#10.3p1"}, {"url": "https://marc.info/?l=openssh-unix-dev&m=177513443901484&w=2"}, {"url": "https://www.openwall.com/lists/oss-security/2026/04/02/3"}], "x_generator": {"engine": "CVE-Request-form 0.0.1"}, "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-670", "description": "CWE-670 Always-Incorrect Control Flow Implementation"}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "10.3"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-04-02T17:43:54.777Z"}}}, "cveMetadata": {"cveId": "CVE-2026-35414", "state": "PUBLISHED", "dateUpdated": "2026-04-02T17:43:54.777Z", "dateReserved": "2026-04-02T17:08:15.208Z", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "datePublished": "2026-04-02T17:08:15.628Z", "assignerShortName": "mitre"}, "dataVersion": "5.2"}