CVE-2026-26187

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-26187", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-02-11T19:56:24.812Z", "datePublished": "2026-02-13T18:34:10.937Z", "dateUpdated": "2026-02-13T19:53:32.197Z"}, "containers": {"cna": {"title": "lakeFS vulnerable to path traversal in local block adapter allow cross-namespace and sibling directory access", "problemTypes": [{"descriptions": [{"cweId": "CWE-22", "lang": "en", "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/treeverse/lakeFS/security/advisories/GHSA-699m-4v95-rmpm", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/treeverse/lakeFS/security/advisories/GHSA-699m-4v95-rmpm"}, {"name": "https://github.com/treeverse/lakeFS/commit/cbc106275357302a834280f133265dc39f1384ce", "tags": ["x_refsource_MISC"], "url": "https://github.com/treeverse/lakeFS/commit/cbc106275357302a834280f133265dc39f1384ce"}, {"name": "https://github.com/treeverse/lakeFS/releases/tag/v1.77.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/treeverse/lakeFS/releases/tag/v1.77.0"}], "affected": [{"vendor": "treeverse", "product": "lakeFS", "versions": [{"version": "< 1.77.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-02-13T18:34:10.937Z"}, "descriptions": [{"lang": "en", "value": "lakeFS is an open-source tool that transforms object storage into a Git-like repositories. Prior to 1.77.0, the local block adapter (pkg/block/local/adapter.go) allows authenticated users to read and write files outside their designated storage boundaries. The verifyRelPath function used strings.HasPrefix() to verify that requested paths fall within the configured storage directory. This check was insufficient because it validated only the path prefix without requiring a path separator, allowing access to sibling directories with similar names. Also, the adapter verified that resolved paths stayed within the adapter's base path, but did not verify that object identifiers stayed within their designated storage namespace. This allowed attackers to use path traversal sequences in the object identifier to access files in other namespaces. Fixed in version v1.77.0."}], "source": {"advisory": "GHSA-699m-4v95-rmpm", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-02-13T19:52:09.607970Z", "id": "CVE-2026-26187", "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": "2026-02-13T19:53:32.197Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-26187", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-02-13T19:52:09.607970Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-02-13T19:53:23.436Z"}}], "cna": {"title": "lakeFS vulnerable to path traversal in local block adapter allow cross-namespace and sibling directory access", "source": {"advisory": "GHSA-699m-4v95-rmpm", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}], "affected": [{"vendor": "treeverse", "product": "lakeFS", "versions": [{"status": "affected", "version": "< 1.77.0"}]}], "references": [{"url": "https://github.com/treeverse/lakeFS/security/advisories/GHSA-699m-4v95-rmpm", "name": "https://github.com/treeverse/lakeFS/security/advisories/GHSA-699m-4v95-rmpm", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/treeverse/lakeFS/commit/cbc106275357302a834280f133265dc39f1384ce", "name": "https://github.com/treeverse/lakeFS/commit/cbc106275357302a834280f133265dc39f1384ce", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/treeverse/lakeFS/releases/tag/v1.77.0", "name": "https://github.com/treeverse/lakeFS/releases/tag/v1.77.0", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "lakeFS is an open-source tool that transforms object storage into a Git-like repositories. Prior to 1.77.0, the local block adapter (pkg/block/local/adapter.go) allows authenticated users to read and write files outside their designated storage boundaries. The verifyRelPath function used strings.HasPrefix() to verify that requested paths fall within the configured storage directory. This check was insufficient because it validated only the path prefix without requiring a path separator, allowing access to sibling directories with similar names. Also, the adapter verified that resolved paths stayed within the adapter's base path, but did not verify that object identifiers stayed within their designated storage namespace. This allowed attackers to use path traversal sequences in the object identifier to access files in other namespaces. Fixed in version v1.77.0."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-22", "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-02-13T18:34:10.937Z"}}}, "cveMetadata": {"cveId": "CVE-2026-26187", "state": "PUBLISHED", "dateUpdated": "2026-02-13T19:53:32.197Z", "dateReserved": "2026-02-11T19:56:24.812Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-02-13T18:34:10.937Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "lakeFS", "vendor": "treeverse", "versions": [{"status": "affected", "version": "< 1.77.0"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:lakefs:lakefs:*:*:*:*:*:*:*:*", "matchCriteriaId": "F1A8EEB4-D5B5-419E-AFB3-DE354DB020F3", "versionEndExcluding": "1.77.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "lakeFS is an open-source tool that transforms object storage into a Git-like repositories. Prior to 1.77.0, the local block adapter (pkg/block/local/adapter.go) allows authenticated users to read and write files outside their designated storage boundaries. The verifyRelPath function used strings.HasPrefix() to verify that requested paths fall within the configured storage directory. This check was insufficient because it validated only the path prefix without requiring a path separator, allowing access to sibling directories with similar names. Also, the adapter verified that resolved paths stayed within the adapter's base path, but did not verify that object identifiers stayed within their designated storage namespace. This allowed attackers to use path traversal sequences in the object identifier to access files in other namespaces. Fixed in version v1.77.0."}, {"lang": "es", "value": "lakeFS es una herramienta de c\u00f3digo abierto que transforma el almacenamiento de objetos en repositorios similares a Git. Antes de la versi\u00f3n 1.77.0, el adaptador de bloque local (pkg/block/local/adapter.go) permit\u00eda a los usuarios autenticados leer y escribir archivos fuera de sus l\u00edmites de almacenamiento designados. La funci\u00f3n verifyRelPath utilizaba strings.HasPrefix() para verificar que las rutas solicitadas estuvieran dentro del directorio de almacenamiento configurado. Esta verificaci\u00f3n era insuficiente porque validaba solo el prefijo de la ruta sin requerir un separador de ruta, lo que permit\u00eda el acceso a directorios hermanos con nombres similares. Adem\u00e1s, el adaptador verificaba que las rutas resueltas permanecieran dentro de la ruta base del adaptador, pero no verificaba que los identificadores de objeto permanecieran dentro de su espacio de nombres de almacenamiento designado. Esto permit\u00eda a los atacantes utilizar secuencias de salto de ruta en el identificador de objeto para acceder a archivos en otros espacios de nombres. Corregido en la versi\u00f3n v1.77.0."}], "id": "CVE-2026-26187", "lastModified": "2026-06-17T10:25:54.520", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.2, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-26187", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-02-13T19:52:09.607970Z", "version": "2.0.3"}}]}, "published": "2026-02-13T19:17:29.100", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/treeverse/lakeFS/commit/cbc106275357302a834280f133265dc39f1384ce"}, {"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/treeverse/lakeFS/releases/tag/v1.77.0"}, {"source": "security-advisories@github.com", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://github.com/treeverse/lakeFS/security/advisories/GHSA-699m-4v95-rmpm"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.77.0)"}}], "product": "lakefs", "vendor": "treeverse"}], "analysis": {"en": {"generated_at": "2026-04-17T19:49:23.416027+00:00", "value": {"mitigation_remediation": ["Upgrade lakeFS to version 1.77.0 or newer to receive the fix for the local block adapter path validation.", "Modify lakeFS configuration to enforce stringent namespace separation and validate object identifiers against the correct namespace before performing any file operation.", "Apply operating\u2011system level access controls or container isolation to restrict the file system paths that the lakeFS process can access, minimizing potential impact if the vulnerability is inadvertently exploited."], "summary": {"action": "Immediate Patch", "impact": "Unauthorized file read and write across namespaces and sibling directories via path traversal in lakeFS local block adapter"}, "threat_synthesis": {"affected_systems": "The issue affects installations of lakeFS produced by treeverse, specifically versions prior to 1.77.0. No version beyond 1.77.0 is vulnerable. Disaster remediation requires updating to v1.77.0 or later.", "description_and_impact": "The vulnerability resides in lakeFS\u2019s local block adapter where path validation uses a simple string prefix check, allowing legitimate users to open files outside their allocated storage directory. Attackers can use path traversal sequences or exploit similarly named sibling directories to read or modify data in other namespaces, compromising confidentiality and integrity of stored objects. This flaw is a classic absolute path traversal (CWE\u201122).", "risk_and_exploitability": "The CVSS score of 8.1 indicates a high severity flaw. However, the EPSS score of less than 1% suggests a very low current probability of exploitation. The vulnerability is not listed in CISA\u2019s KEV catalog, implying no publicly known exploits yet. The attack requires an authenticated user and the ability to issue file read/write commands through the local block adapter, so it is moderately exploitable in environments with weak access controls or where the adapter is exposed to untrusted actors."}}}}, "created": "2026-02-13T21:28:27.185302+00:00", "updated": "2026-04-17T20:00:09.010814+00:00", "vendors": ["treeverse", "treeverse$PRODUCT$lakefs"]}