{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-39322", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-06T19:31:07.266Z", "datePublished": "2026-04-07T19:03:28.999Z", "dateUpdated": "2026-04-09T16:16:51.970Z"}, "containers": {"cna": {"title": "PolarLearn: Any password authenticates banned accounts and grants API access", "problemTypes": [{"descriptions": [{"cweId": "CWE-287", "lang": "en", "description": "CWE-287: Improper Authentication", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 9.2, "baseSeverity": "CRITICAL", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/polarnl/PolarLearn/security/advisories/GHSA-9vx4-7ww7-4cf5", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/polarnl/PolarLearn/security/advisories/GHSA-9vx4-7ww7-4cf5"}], "affected": [{"vendor": "polarnl", "product": "PolarLearn", "versions": [{"version": "<= v0-PRERELEASE-15", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-07T19:03:28.999Z"}, "descriptions": [{"lang": "en", "value": "PolarLearn is a free and open-source learning program. In 0-PRERELEASE-15 and earlier, POST /api/v1/auth/sign-in creates a valid session for banned accounts before verifying the supplied password. That session is then accepted across authenticated /api routes, enabling account data access and authenticated actions as the banned user."}], "source": {"advisory": "GHSA-9vx4-7ww7-4cf5", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-04-09T16:15:12.229498Z", "id": "CVE-2026-39322", "options": [{"Exploitation": "none"}, {"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": "2026-04-09T16:16:51.970Z"}}]}}

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,v0-PRERELEASE-15]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "PolarLearn", "source": "cna", "vendor": "polarnl"}, "product": "polarlearn", "vendor": "polarnl"}], "analysis": {"en": {"generated_at": "2026-04-07T21:54:05.459209+00:00", "value": {"mitigation_remediation": ["Upgrade PolarLearn to a version later than 0-PRERELEASE-15.", "If upgrade is delayed, configure the API gateway or firewall to block sign-in attempts from banned accounts.", "Verify that the authentication logic checks the password before creating a session in any custom code or patch."], "summary": {"action": "Immediate Patch", "impact": "Unauthorized API Access"}, "threat_synthesis": {"affected_systems": "Affected vendors and products include PolarLearn from polarnl. The bug exists in release 0-PRERELEASE-15 and earlier. Later releases have presumably removed the issue; therefore any deployment of these versions is exposed.", "description_and_impact": "The vulnerability allows any password to authenticate accounts that have been banned. When a POST request is sent to /api/v1/auth/sign-in, the system creates a session for the banned user before it verifies the password. This session is accepted by subsequent authenticated routes, giving an attacker access to the banned account\u2019s data and the ability to perform actions that should be restricted.", "risk_and_exploitability": "The CVSS score of 9.2 indicates critical severity. The exploit does not have an EPSS rating, but the absence of a KEV listing does not lower the risk. An attacker can remotely trigger the flaw by sending a single HTTP POST to the authentication endpoint, provided the account is banned. Successful exploitation grants full API access to the banned account\u2019s resources, effectively bypassing the intended restriction."}}}}, "created": "2026-04-08T19:34:49.980922+00:00", "updated": "2026-04-08T19:46:28.047556+00:00", "vendors": ["polarnl", "polarnl$PRODUCT$polarlearn"]}