CVE-2026-51082

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A race condition between the vncproxy and vncwebsocket API calls in Proxmox Virtual Environment (PVE) 9.x pve-manager before 9.1.9 and 8.x before 8.4.19; qemu-server 9.x before 9.1.7 and 8.x before 8.4.7; and pve-container before 6.1.3 (PVE 9.x) and before 5.3.4 (PVE 8.x) allows an attacker with privileges to call \"vncproxy\" to hijack a VNC session that is established in parallel by a different user for a different VM."}], "id": "CVE-2026-51082", "lastModified": "2026-07-17T18:28:39.220", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-51082", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-07-17T16:44:15.514638Z", "version": "2.0.3"}}]}, "published": "2026-07-17T15:16:46.867", "references": [{"source": "cve@mitre.org", "url": "https://forum.proxmox.com/threads/proxmox-virtual-environment-security-advisories.149331/post-849971"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.1.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,5.3.4)"}}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "pve-container", "vendor": "proxmox"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,9.1.9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,8.4.19)"}}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "pve-manager", "vendor": "proxmox"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,9.1.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,8.4.7)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "qemu", "vendor": "qemu"}], "created": "2026-07-22T04:00:04.878709+00:00", "title": "Race Condition Enables VNC Session Hijacking in Proxmox Virtual Environment", "updated": "2026-07-31T01:00:14.247108+00:00", "vendors": ["proxmox", "proxmox$PRODUCT$pve-container", "proxmox$PRODUCT$pve-manager", "qemu", "qemu$PRODUCT$qemu"]}