CVE-2026-104871

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-104871", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-02T14:59:11.775Z", "datePublished": "2026-10-02T19:43:50.475Z", "dateUpdated": "2026-10-02T20:12:49.364Z"}, "containers": {"cna": {"title": "Angular SSR: Path Traversal to Sibling Directories in CommonEngine on Windows", "problemTypes": [{"descriptions": [{"cweId": "CWE-22", "lang": "en", "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 6.3, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/angular/angular-cli/security/advisories/GHSA-7g7c-h8rr-7p6q", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/angular/angular-cli/security/advisories/GHSA-7g7c-h8rr-7p6q"}, {"name": "https://github.com/angular/angular-cli/commit/645e41a47d21b7651837a4250de99af0509626e2", "tags": ["x_refsource_MISC"], "url": "https://github.com/angular/angular-cli/commit/645e41a47d21b7651837a4250de99af0509626e2"}, {"name": "https://github.com/angular/angular-cli/commit/70748ca8e76fe4b42798719410336119d943e755", "tags": ["x_refsource_MISC"], "url": "https://github.com/angular/angular-cli/commit/70748ca8e76fe4b42798719410336119d943e755"}, {"name": "https://github.com/angular/angular-cli/commit/bb72145f9ab45aee29f523236b3a25cd0813a841", "tags": ["x_refsource_MISC"], "url": "https://github.com/angular/angular-cli/commit/bb72145f9ab45aee29f523236b3a25cd0813a841"}, {"name": "https://github.com/angular/angular-cli/commit/c3e5982e49705f0f6a913cb94622b4c555d2d914", "tags": ["x_refsource_MISC"], "url": "https://github.com/angular/angular-cli/commit/c3e5982e49705f0f6a913cb94622b4c555d2d914"}, {"name": "https://github.com/angular/angular-cli/releases/tag/v20.3.36", "tags": ["x_refsource_MISC"], "url": "https://github.com/angular/angular-cli/releases/tag/v20.3.36"}, {"name": "https://github.com/angular/angular-cli/releases/tag/v21.2.23", "tags": ["x_refsource_MISC"], "url": "https://github.com/angular/angular-cli/releases/tag/v21.2.23"}, {"name": "https://github.com/angular/angular-cli/releases/tag/v22.1.7", "tags": ["x_refsource_MISC"], "url": "https://github.com/angular/angular-cli/releases/tag/v22.1.7"}], "affected": [{"vendor": "angular", "product": "angular-cli", "versions": [{"version": "< 20.3.36", "status": "affected"}, {"version": ">= 21.0.0, < 21.2.23", "status": "affected"}, {"version": ">= 22.0.0, < 22.1.7", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-02T19:43:50.475Z"}, "descriptions": [{"lang": "en", "value": "The Angular SSR is a server-rise rendering tool for Angular applications. Prior to versions 20.3.36, 21.2.23, and 22.1.7, the CommonEngine retrieveSSGPage prerendered-page retrieval logic in @angular/ssr/node, and in @angular/ssr for versions 17 through 18, accepts a relative request URL containing a backslash parent-traversal segment on Windows. The non-special resolve:// URL base preserves the backslash, path.join interprets it as a Windows separator, and the pagePath.startsWith(normalize(publicPath)) check incorrectly accepts a sibling output directory whose name shares the configured public-directory prefix. An unauthenticated requester can therefore retrieve a sibling prerendered HTML page when that page contains the Angular SSG marker. The issue is limited to Windows deployments that pass relative request URLs to CommonEngine.render, have a prefix-sharing sibling output directory, and contain qualifying prerendered Angular HTML; it does not provide arbitrary file read. This issue is fixed in versions 20.3.36, 21.2.23, and 22.1.7."}], "source": {"advisory": "GHSA-7g7c-h8rr-7p6q", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-02T20:12:27.563771Z", "id": "CVE-2026-104871", "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": "2026-10-02T20:12:49.364Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-104871", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-02T20:12:27.563771Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-02T20:12:44.850Z"}}], "cna": {"title": "Angular SSR: Path Traversal to Sibling Directories in CommonEngine on Windows", "source": {"advisory": "GHSA-7g7c-h8rr-7p6q", "discovery": "UNKNOWN"}, "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 6.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "LOW"}}], "affected": [{"vendor": "angular", "product": "angular-cli", "versions": [{"status": "affected", "version": "< 20.3.36"}, {"status": "affected", "version": ">= 21.0.0, < 21.2.23"}, {"status": "affected", "version": ">= 22.0.0, < 22.1.7"}]}], "references": [{"url": "https://github.com/angular/angular-cli/security/advisories/GHSA-7g7c-h8rr-7p6q", "name": "https://github.com/angular/angular-cli/security/advisories/GHSA-7g7c-h8rr-7p6q", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/angular/angular-cli/commit/645e41a47d21b7651837a4250de99af0509626e2", "name": "https://github.com/angular/angular-cli/commit/645e41a47d21b7651837a4250de99af0509626e2", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/angular/angular-cli/commit/70748ca8e76fe4b42798719410336119d943e755", "name": "https://github.com/angular/angular-cli/commit/70748ca8e76fe4b42798719410336119d943e755", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/angular/angular-cli/commit/bb72145f9ab45aee29f523236b3a25cd0813a841", "name": "https://github.com/angular/angular-cli/commit/bb72145f9ab45aee29f523236b3a25cd0813a841", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/angular/angular-cli/commit/c3e5982e49705f0f6a913cb94622b4c555d2d914", "name": "https://github.com/angular/angular-cli/commit/c3e5982e49705f0f6a913cb94622b4c555d2d914", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/angular/angular-cli/releases/tag/v20.3.36", "name": "https://github.com/angular/angular-cli/releases/tag/v20.3.36", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/angular/angular-cli/releases/tag/v21.2.23", "name": "https://github.com/angular/angular-cli/releases/tag/v21.2.23", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/angular/angular-cli/releases/tag/v22.1.7", "name": "https://github.com/angular/angular-cli/releases/tag/v22.1.7", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "The Angular SSR is a server-rise rendering tool for Angular applications. Prior to versions 20.3.36, 21.2.23, and 22.1.7, the CommonEngine retrieveSSGPage prerendered-page retrieval logic in @angular/ssr/node, and in @angular/ssr for versions 17 through 18, accepts a relative request URL containing a backslash parent-traversal segment on Windows. The non-special resolve:// URL base preserves the backslash, path.join interprets it as a Windows separator, and the pagePath.startsWith(normalize(publicPath)) check incorrectly accepts a sibling output directory whose name shares the configured public-directory prefix. An unauthenticated requester can therefore retrieve a sibling prerendered HTML page when that page contains the Angular SSG marker. The issue is limited to Windows deployments that pass relative request URLs to CommonEngine.render, have a prefix-sharing sibling output directory, and contain qualifying prerendered Angular HTML; it does not provide arbitrary file read. This issue is fixed in versions 20.3.36, 21.2.23, and 22.1.7."}], "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": "2026-10-02T19:43:50.475Z"}}}, "cveMetadata": {"cveId": "CVE-2026-104871", "state": "PUBLISHED", "dateUpdated": "2026-10-02T20:12:49.364Z", "dateReserved": "2026-10-02T14:59:11.775Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-10-02T19:43:50.475Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "angular-cli", "vendor": "angular", "versions": [{"status": "affected", "version": "< 20.3.36"}, {"status": "affected", "version": ">= 21.0.0, < 21.2.23"}, {"status": "affected", "version": ">= 22.0.0, < 22.1.7"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The Angular SSR is a server-rise rendering tool for Angular applications. Prior to versions 20.3.36, 21.2.23, and 22.1.7, the CommonEngine retrieveSSGPage prerendered-page retrieval logic in @angular/ssr/node, and in @angular/ssr for versions 17 through 18, accepts a relative request URL containing a backslash parent-traversal segment on Windows. The non-special resolve:// URL base preserves the backslash, path.join interprets it as a Windows separator, and the pagePath.startsWith(normalize(publicPath)) check incorrectly accepts a sibling output directory whose name shares the configured public-directory prefix. An unauthenticated requester can therefore retrieve a sibling prerendered HTML page when that page contains the Angular SSG marker. The issue is limited to Windows deployments that pass relative request URLs to CommonEngine.render, have a prefix-sharing sibling output directory, and contain qualifying prerendered Angular HTML; it does not provide arbitrary file read. This issue is fixed in versions 20.3.36, 21.2.23, and 22.1.7."}], "id": "CVE-2026-104871", "lastModified": "2026-10-06T16:00:36.547", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.3, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-104871", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-02T20:12:27.563771Z", "version": "2.0.3"}}]}, "published": "2026-10-02T20:17:00.910", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/angular/angular-cli/commit/645e41a47d21b7651837a4250de99af0509626e2"}, {"source": "security-advisories@github.com", "url": "https://github.com/angular/angular-cli/commit/70748ca8e76fe4b42798719410336119d943e755"}, {"source": "security-advisories@github.com", "url": "https://github.com/angular/angular-cli/commit/bb72145f9ab45aee29f523236b3a25cd0813a841"}, {"source": "security-advisories@github.com", "url": "https://github.com/angular/angular-cli/commit/c3e5982e49705f0f6a913cb94622b4c555d2d914"}, {"source": "security-advisories@github.com", "url": "https://github.com/angular/angular-cli/releases/tag/v20.3.36"}, {"source": "security-advisories@github.com", "url": "https://github.com/angular/angular-cli/releases/tag/v21.2.23"}, {"source": "security-advisories@github.com", "url": "https://github.com/angular/angular-cli/releases/tag/v22.1.7"}, {"source": "security-advisories@github.com", "url": "https://github.com/angular/angular-cli/security/advisories/GHSA-7g7c-h8rr-7p6q"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,20.3.36)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[21.0.0,21.2.23)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[22.0.0,22.1.7)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "angular-cli", "source": "cna", "vendor": "angular"}, "product": "angular_cli", "vendor": "angular"}], "created": "2026-10-02T20:30:16.216984+00:00", "updated": "2026-10-02T20:30:16.743280+00:00", "vendors": ["angular", "angular$PRODUCT$angular_cli"]}