{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-1842","assignerOrgId":"0a72a055-908d-47f5-a16a-1f09049c16c6","state":"PUBLISHED","assignerShortName":"SoftIron","dateReserved":"2026-02-03T17:15:55.203Z","datePublished":"2026-02-20T16:23:16.498Z","dateUpdated":"2026-02-20T18:54:48.311Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"HyperCloud","vendor":"SoftIron","versions":[{"lessThan":"2.6.9","status":"affected","version":"2.3.5","versionType":"semver"}]}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"HyperCloud versions 2.3.5 through 2.6.8 improperly allowed refresh tokens to be used directly for resource access and failed to invalidate previously issued access tokens when a refresh token was used. Because refresh tokens have a significantly longer lifetime (default one year), an authenticated client could use a refresh token in place of an access token to maintain long-term access without token rotation. Additionally, old access tokens remained valid after refresh, enabling concurrent or extended use beyond intended session boundaries. This vulnerability could allow prolonged unauthorized access if a token is disclosed.<br>"}],"value":"HyperCloud versions 2.3.5 through 2.6.8 improperly allowed refresh tokens to be used directly for resource access and failed to invalidate previously issued access tokens when a refresh token was used. Because refresh tokens have a significantly longer lifetime (default one year), an authenticated client could use a refresh token in place of an access token to maintain long-term access without token rotation. Additionally, old access tokens remained valid after refresh, enabling concurrent or extended use beyond intended session boundaries. This vulnerability could allow prolonged unauthorized access if a token is disclosed."}],"impacts":[{"capecId":"CAPEC-593","descriptions":[{"lang":"en","value":"CAPEC-593 Session Hijacking"}]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.2,"baseSeverity":"MEDIUM","exploitMaturity":"UNREPORTED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-613","description":"CWE-613 Insufficient Session Expiration","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"0a72a055-908d-47f5-a16a-1f09049c16c6","shortName":"SoftIron","dateUpdated":"2026-02-20T16:23:16.498Z"},"references":[{"url":"https://advisories.softiron.cloud/"}],"source":{"discovery":"UNKNOWN"},"title":"HyperCloud Improper Refresh Token Validation and Access Token Invalidation Allows Long-Term Unauthorized Access","x_generator":{"engine":"Vulnogram 0.5.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-02-20T18:53:42.171662Z","id":"CVE-2026-1842","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":"2026-02-20T18:54:48.311Z"}}]}}