{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-50553", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-04T20:37:18.654Z", "datePublished": "2026-09-04T17:25:11.331Z", "dateUpdated": "2026-09-04T17:46:40.884Z"}, "containers": {"cna": {"title": "Note Mark: Path traversal via unsanitized book/note slug in migrate export (sibling of GHSA-g49p)", "problemTypes": [{"descriptions": [{"cweId": "CWE-20", "lang": "en", "description": "CWE-20: Improper Input Validation", "type": "CWE"}]}, {"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": "NONE", "privilegesRequired": "LOW", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.6, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/enchant97/note-mark/security/advisories/GHSA-rqrh-8wpv-x7hh", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/enchant97/note-mark/security/advisories/GHSA-rqrh-8wpv-x7hh"}, {"name": "https://github.com/enchant97/note-mark/commit/67b7de04308a858ef27ceff87b514067b6d667e5", "tags": ["x_refsource_MISC"], "url": "https://github.com/enchant97/note-mark/commit/67b7de04308a858ef27ceff87b514067b6d667e5"}, {"name": "https://github.com/enchant97/note-mark/releases/tag/v0.19.5", "tags": ["x_refsource_MISC"], "url": "https://github.com/enchant97/note-mark/releases/tag/v0.19.5"}], "affected": [{"vendor": "enchant97", "product": "note-mark", "versions": [{"version": "< 0.19.5", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-04T17:25:11.331Z"}, "descriptions": [{"lang": "en", "value": "Note Mark is an open-source note-taking application. Prior to version 0.19.5, Note Mark validates book and note slug values with the OpenAPI/huma tag pattern:\"[a-z0-9-]+\". huma compiles this with regexp.MustCompile(s.Pattern) and tests it with patternRe.MatchString(str), an UNANCHORED match. Because the pattern is not anchored (^...$), any string that merely CONTAINS one [a-z0-9-] substring passes validation. A slug such as ../../../../../../tmp/escape is accepted and stored verbatim. The data-export CLI commands (note-mark migrate export and note-mark migrate export-v1) join these unsanitized slugs straight into the output path with path.Join / filepath.Join, then os.MkdirAll the directory and os.Create the note file. path.Join resolves the ../ segments, so the note content file is written OUTSIDE the configured export directory. The export process commonly runs as root (default in Docker / bare-metal admin usage), so this is a root-privilege arbitrary directory create + file write. This issue has been patched in version 0.19.5."}], "source": {"advisory": "GHSA-rqrh-8wpv-x7hh", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/enchant97/note-mark/security/advisories/GHSA-rqrh-8wpv-x7hh", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-04T17:46:26.605003Z", "id": "CVE-2026-50553", "options": [{"Exploitation": "poc"}, {"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": "2026-09-04T17:46:40.884Z"}}]}}

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