{"id":"CVE-2026-50553","state":"PUBLISHED","title":"Note Mark: Path traversal via unsanitized book/note slug in migrate export (sibling of GHSA-g49p)","description":"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.","publishedAt":"2026-09-04T17:25:11.331Z","updatedAt":"2026-09-04T17:46:40.884Z","severity":{"score":8.6,"label":"High","version":"4.0","vector":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["enchant97 note-mark"],"affected":[{"vendor":"enchant97","product":"note-mark","versions":[{"version":"< 0.19.5","status":"affected"}]}],"references":["https://github.com/enchant97/note-mark/security/advisories/GHSA-rqrh-8wpv-x7hh","https://github.com/enchant97/note-mark/commit/67b7de04308a858ef27ceff87b514067b6d667e5","https://github.com/enchant97/note-mark/releases/tag/v0.19.5"],"weaknesses":["CWE-20","CWE-22"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/50xxx/CVE-2026-50553.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-50553","state":"PUBLISHED","datePublished":"2026-09-04T17:25:11.331Z","dateUpdated":"2026-09-04T17:46:40.884Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-04T20:37:18.654Z"},"containers":{"cna":{"title":"Note Mark: Path traversal via unsanitized book/note slug in migrate export (sibling of GHSA-g49p)","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."}],"affected":[{"vendor":"enchant97","product":"note-mark","versions":[{"version":"< 0.19.5","status":"affected"}]}],"references":[{"url":"https://github.com/enchant97/note-mark/security/advisories/GHSA-rqrh-8wpv-x7hh","name":"https://github.com/enchant97/note-mark/security/advisories/GHSA-rqrh-8wpv-x7hh","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/enchant97/note-mark/commit/67b7de04308a858ef27ceff87b514067b6d667e5","name":"https://github.com/enchant97/note-mark/commit/67b7de04308a858ef27ceff87b514067b6d667e5","tags":["x_refsource_MISC"]},{"url":"https://github.com/enchant97/note-mark/releases/tag/v0.19.5","name":"https://github.com/enchant97/note-mark/releases/tag/v0.19.5","tags":["x_refsource_MISC"]}],"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"}}],"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"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-04T17:25:11.331Z"},"source":{"advisory":"GHSA-rqrh-8wpv-x7hh","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-04T17:46:40.884Z"}}]}}}