{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31893", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-09T21:59:02.687Z", "datePublished": "2026-05-05T18:55:41.737Z", "dateUpdated": "2026-05-05T19:37:47.926Z"}, "containers": {"cna": {"title": "Tunnelblick arbitrary file read via symlink following in tunnelblickd", "problemTypes": [{"descriptions": [{"cweId": "CWE-61", "lang": "en", "description": "CWE-61: UNIX Symbolic Link (Symlink) Following", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 6.8, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/Tunnelblick/Tunnelblick/security/advisories/GHSA-927j-vcjf-hq69", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/Tunnelblick/Tunnelblick/security/advisories/GHSA-927j-vcjf-hq69"}, {"name": "https://github.com/Tunnelblick/Tunnelblick/releases/tag/v9.0beta02", "tags": ["x_refsource_MISC"], "url": "https://github.com/Tunnelblick/Tunnelblick/releases/tag/v9.0beta02"}], "affected": [{"vendor": "Tunnelblick", "product": "Tunnelblick", "versions": [{"version": ">= 3.3beta26, < 9.0beta02", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-05T18:55:41.737Z"}, "descriptions": [{"lang": "en", "value": "Tunnelblick is an open source graphic user interface for OpenVPN on macOS. In versions 3.3beta26 through 9.0beta01, any local user can read arbitrary root-owned files by exploiting a symlink following vulnerability in tunnelblick-helper, reachable through the world-accessible tunnelblickd Unix socket. The socket is configured with mode 0666, allowing any local user to connect. No authorization check is performed on the connecting client. The tunnelblick-helper process constructs a path to config.ovpn inside a user-controlled .tblk directory and reads it as root without symlink validation. An attacker can create a .tblk configuration with a symlinked config.ovpn pointing to any file and request tunnelblickd to read it. This issue has been fixed in versions 9.0beta02."}], "source": {"advisory": "GHSA-927j-vcjf-hq69", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/Tunnelblick/Tunnelblick/security/advisories/GHSA-927j-vcjf-hq69", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-05T19:37:28.228929Z", "id": "CVE-2026-31893", "options": [{"Exploitation": "poc"}, {"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": "2026-05-05T19:37:47.926Z"}}]}}

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{}

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