{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-62943", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-14T22:32:17.731Z", "datePublished": "2026-09-18T16:24:48.513Z", "dateUpdated": "2026-09-21T20:50:09.611Z"}, "containers": {"cna": {"title": "btrbk: SSH Command Filter Bypass in ssh_filter_btrbk.sh", "problemTypes": [{"descriptions": [{"cweId": "CWE-78", "lang": "en", "description": "CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/digint/btrbk/security/advisories/GHSA-pf45-7g54-65h5", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/digint/btrbk/security/advisories/GHSA-pf45-7g54-65h5"}, {"name": "https://github.com/digint/btrbk/commit/29ca3c093205395bdeb9dd98677ab4139c458aec", "tags": ["x_refsource_MISC"], "url": "https://github.com/digint/btrbk/commit/29ca3c093205395bdeb9dd98677ab4139c458aec"}, {"name": "https://github.com/digint/btrbk/releases/tag/v0.32.7", "tags": ["x_refsource_MISC"], "url": "https://github.com/digint/btrbk/releases/tag/v0.32.7"}], "affected": [{"vendor": "digint", "product": "btrbk", "versions": [{"version": ">= 0.29.0, < 0.32.7", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-18T16:24:48.513Z"}, "descriptions": [{"lang": "en", "value": "btrbk is a tool for creating snapshots and remote backups of Btrfs subvolumes. From 0.29.0 until 0.32.7, btrbk's ssh_filter_btrbk.sh constructs allow_stream_match with a start anchor but without an end-of-string anchor for the complete command. A user restricted through an authorized_keys forced command can append a trailing pipe command after a valid btrbk command prefix, bypassing the allowlist and executing arbitrary commands with the privileges of the backup-target SSH account. Deployments that do not use ssh_filter_btrbk.sh in authorized_keys are not affected. This issue is fixed in version 0.32.7."}], "source": {"advisory": "GHSA-pf45-7g54-65h5", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-18T19:24:36.668834Z", "id": "CVE-2026-62943", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-21T20:50:09.611Z"}}]}}

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