{"id":"CVE-2026-1842","state":"PUBLISHED","title":"HyperCloud Improper Refresh Token Validation and Access Token Invalidation Allows Long-Term Unauthorized Access","description":"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.","publishedAt":"2026-02-20T16:23:16.498Z","updatedAt":"2026-02-20T18:54:48.311Z","severity":{"score":6.2,"label":"Medium","version":"4.0","vector":"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","source":"SoftIron"},"assigner":"SoftIron","products":["SoftIron HyperCloud"],"affected":[{"vendor":"SoftIron","product":"HyperCloud","defaultStatus":"unaffected","versions":[{"version":"2.3.5","status":"affected","lessThan":"2.6.9","versionType":"semver"}]}],"references":["https://advisories.softiron.cloud/"],"weaknesses":["CWE-613"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/1xxx/CVE-2026-1842.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-1842","state":"PUBLISHED","datePublished":"2026-02-20T16:23:16.498Z","dateUpdated":"2026-02-20T18:54:48.311Z","assignerShortName":"SoftIron","assignerOrgId":"0a72a055-908d-47f5-a16a-1f09049c16c6","dateReserved":"2026-02-03T17:15:55.203Z"},"containers":{"cna":{"title":"HyperCloud Improper Refresh Token Validation and Access Token Invalidation Allows Long-Term Unauthorized Access","descriptions":[{"lang":"en","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."}],"affected":[{"vendor":"SoftIron","product":"HyperCloud","defaultStatus":"unaffected","versions":[{"version":"2.3.5","status":"affected","lessThan":"2.6.9","versionType":"semver"}]}],"references":[{"url":"https://advisories.softiron.cloud/"}],"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":{"shortName":"SoftIron","orgId":"0a72a055-908d-47f5-a16a-1f09049c16c6","dateUpdated":"2026-02-20T16:23:16.498Z"},"impacts":[{"capecId":"CAPEC-593","descriptions":[{"lang":"en","value":"CAPEC-593 Session Hijacking"}]}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 0.5.0"}},"adp":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-02-20T18:54:48.311Z"}}]}}}