{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72688","assignerOrgId":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c","state":"PUBLISHED","assignerShortName":"TuranSec","dateReserved":"2026-08-10T11:55:39.470Z","datePublished":"2026-08-10T11:59:02.770Z","dateUpdated":"2026-08-10T18:22:30.882Z"},"containers":{"cna":{"providerMetadata":{"orgId":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c","shortName":"TuranSec","dateUpdated":"2026-08-10T11:59:02.770Z"},"title":"OpenSignLabs opensignserver - Missing Authentication for Critical Function","descriptions":[{"lang":"en","value":"A missing authentication vulnerability in OpenSignLabs opensignserver through 2.37.0 allows an unauthenticated remote attacker to read arbitrary stored documents via the fileupload Parse cloud function. The function mints MASTER_KEY-signed file access tokens for any caller-supplied URL without performing any session check, defeating the only access control protecting stored contract files.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>A missing authentication vulnerability in OpenSignLabs opensignserver through 2.37.0 allows an unauthenticated remote attacker to read arbitrary stored documents via the fileupload Parse cloud function. The function mints MASTER_KEY-signed file access tokens for any caller-supplied URL without performing any session check, defeating the only access control protecting stored contract files.</p>"}]}],"affected":[{"vendor":"OpenSignLabs","product":"opensignserver","defaultStatus":"affected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2.37.0","versionType":"semver"}]}],"references":[{"url":"https://github.com/OpenSignLabs/OpenSign","name":"OpenSign GitHub Repository","tags":["third-party-advisory"]}],"credits":[{"lang":"en","value":"Bobur Abdugafforov (Mahadsec)","type":"finder"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"}}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","cweId":"CWE-306","description":"CWE-306: Missing Authentication for Critical Function"}]}],"source":{"discovery":"EXTERNAL"},"datePublic":"2026-08-10T12:00:00.000Z"},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-10T15:51:43.356909Z","id":"CVE-2026-72688","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"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":"2026-08-10T18:22:30.882Z"}}]}}