{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-106073", "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1", "state": "PUBLISHED", "assignerShortName": "hackerone", "dateReserved": "2026-10-06T15:00:00.655Z", "datePublished": "2026-10-23T16:15:05.728Z", "dateUpdated": "2026-10-23T16:15:05.728Z"}, "containers": {"cna": {"descriptions": [{"lang": "en", "value": "A flaw in Node.js Permission Model filesystem enforcement leaves `fs.realpathSync()` without the required read permission checks. This is an incomplete fix of CVE-2026-21715, which only covered `fs.realpathSync.native()`.\n\nAs a result, code running under `--permission` with restricted `--allow-fs-read` can still use `fs.realpathSync()` to check file existence, resolve symlink targets, and enumerate filesystem paths outside of permitted directories.\n\nThis vulnerability affects Node.js **26.x**, **24.x**, and **22.x**."}], "affected": [{"defaultStatus": "unaffected", "vendor": "nodejs", "product": "node", "versions": [{"version": "22.23.3", "status": "affected", "lessThanOrEqual": "22.23.3", "versionType": "semver"}, {"version": "24.22.0", "status": "affected", "lessThanOrEqual": "24.22.0", "versionType": "semver"}, {"version": "26.12.0", "status": "affected", "lessThanOrEqual": "26.12.0", "versionType": "semver"}]}], "references": [{"url": "https://nodejs.org/en/blog/vulnerability/october-2026-security-releases"}], "metrics": [{"cvssV3_0": {"version": "3.0", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "baseScore": 3.3, "baseSeverity": "LOW"}}], "problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "cweId": "CWE-284", "description": "CWE-284 Improper Access Control - Generic"}]}], "providerMetadata": {"orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1", "shortName": "hackerone", "dateUpdated": "2026-10-23T16:15:05.728Z"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "node", "vendor": "nodejs", "versions": [{"lessThanOrEqual": "22.23.3", "status": "affected", "version": "22.23.3", "versionType": "semver"}, {"lessThanOrEqual": "24.22.0", "status": "affected", "version": "24.22.0", "versionType": "semver"}, {"lessThanOrEqual": "26.12.0", "status": "affected", "version": "26.12.0", "versionType": "semver"}]}], "source": "support@hackerone.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw in Node.js Permission Model filesystem enforcement leaves `fs.realpathSync()` without the required read permission checks. This is an incomplete fix of CVE-2026-21715, which only covered `fs.realpathSync.native()`.\n\nAs a result, code running under `--permission` with restricted `--allow-fs-read` can still use `fs.realpathSync()` to check file existence, resolve symlink targets, and enumerate filesystem paths outside of permitted directories.\n\nThis vulnerability affects Node.js **26.x**, **24.x**, and **22.x**."}], "id": "CVE-2026-106073", "lastModified": "2026-10-23T19:42:24.553", "metrics": {"cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 3.3, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "version": "3.0"}, "exploitabilityScore": 1.8, "impactScore": 1.4, "source": "support@hackerone.com", "type": "Secondary"}]}, "published": "2026-10-23T17:17:20.343", "references": [{"source": "support@hackerone.com", "url": "https://nodejs.org/en/blog/vulnerability/october-2026-security-releases"}], "sourceIdentifier": "support@hackerone.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-284"}], "source": "support@hackerone.com", "type": "Secondary"}]}

{"bugzilla": {"description": "nodejs: Node.js: Filesystem read permission bypass via fs.realpathSync()", "id": "2560021", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2560021"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-425", "details": ["A flaw was found in the Node.js Permission Model. fs.realpathSync() does not perform the filesystem read permission checks required of comparable fs APIs. This is an incomplete fix of CVE-2026-21715, which only covered fs.realpathSync.native(). Code running under --permission with restricted --allow-fs-read can still use fs.realpathSync() to probe file existence, resolve symlink targets, and enumerate paths outside permitted directories, leading to information disclosure."], "mitigation": {"lang": "en:us", "value": "If the Permission Model is unused, do not enable --permission.\nWhen --permission is required, avoid relying on fs.realpathSync() for security boundaries; use APIs that enforce permission checks and keep --allow-fs-read minimal (CME-1303: https://cmetaxonomy.org/entries/CME-1303.html).\nApply OS-level confinement (SELinux, containers) as defense in depth (CME-301: https://cmetaxonomy.org/entries/CME-301.html; CME-702: https://cmetaxonomy.org/entries/CME-702.html)."}, "name": "CVE-2026-106073", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "nodejs22", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "nodejs24", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "nodejs26", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "nodejs:22/nodejs", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "nodejs:24/nodejs", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "nodejs:22/nodejs", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "nodejs:24/nodejs", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "nodejs:26/nodejs", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "hi/nodejs", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "nodejs20", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "nodejs22", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "nodejs24", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "nodejs25", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "nodejs26", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-10-23T16:15:05Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-106073\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-106073\nhttps://nodejs.org/en/blog/vulnerability/october-2026-security-releases"], "statement": "This is a Low severity flaw. Red Hat rates it Low, consistent with CVE-2026-21715, because impact is limited to confidentiality of path existence and symlink resolution (Confidentiality Low), and the Permission Model is an opt-in experimental control. Integrity and availability are not affected. Deployments that do not use --permission are not exposed. Platform MAC (SELinux) may still constrain process file access outside the Permission Model but is not assumed to replace Node.js checks in the base score.", "threat_severity": "Low"}