CVE-2026-55241

{"id": "CVE-2026-55241", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-55241", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-25T11:47:48.710908Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "bluewave-labs", "product": "Checkmate", "versions": [{"status": "affected", "version": "< 3.9.1"}]}]}], "published": "2026-08-21T18:16:48.790", "references": [{"url": "https://github.com/bluewave-labs/Checkmate/commit/091c36cbf338b673110b0806d76df26d52516468", "source": "security-advisories@github.com"}, {"url": "https://github.com/bluewave-labs/Checkmate/releases/tag/v3.9.1", "source": "security-advisories@github.com"}, {"url": "https://github.com/bluewave-labs/Checkmate/security/advisories/GHSA-9xvg-x28f-m78m", "source": "security-advisories@github.com"}, {"url": "https://github.com/bluewave-labs/Checkmate/security/advisories/GHSA-9xvg-x28f-m78m", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Received", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-400"}, {"lang": "en", "value": "CWE-770"}]}], "descriptions": [{"lang": "en", "value": "Checkmate is an open-source, self-hosted tool designed to track and monitor server hardware, uptime, response times, and incidents in real-time with beautiful visualizations. Prior to 3.9.1, the public POST /api/v1/auth/register route in server/src/api/routes/authRoutes.ts passes multipart profileImage uploads through in-memory Multer parsing before registration validation, without file-size, file-count, or MIME-type limits in server/src/api/middleware/upload.ts. An unauthenticated attacker can submit concurrent oversized files that are buffered before invalid registration or invite-token checks reject the request, exhausting memory and crashing or destabilizing the backend. This issue is fixed in version 3.9.1."}], "lastModified": "2026-08-25T12:16:24.030", "sourceIdentifier": "security-advisories@github.com"}