CVE-2026-86158

{"id": "CVE-2026-86158", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-86158", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-09-30T15:18:22.768601Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security@progress.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.7, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 2.5}]}, "affected": [{"source": "security@progress.com", "affectedData": [{"vendor": "Progress Software", "product": "Progress\u00ae Telerik\u00ae Fiddler\u00ae Everywhere", "versions": [{"status": "affected", "version": "1.0.0", "lessThan": "8.2.0", "versionType": "custom"}], "defaultStatus": "unaffected"}]}], "published": "2026-09-29T07:16:35.520", "references": [{"url": "https://www.telerik.com/fiddler/fiddler-everywhere/documentation/knowledge-base/kb-security-missing-authentication-for-critical-function-cve-2026-86158", "source": "security@progress.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "security@progress.com", "description": [{"lang": "en", "value": "CWE-306"}]}], "descriptions": [{"lang": "en", "value": "Missing authentication in the local .NET backend (Fiddler.WebUi) of Progress Software Fiddler Everywhere 8.0.2 allows a local unauthenticated attacker to mint OAuth tokens and read the machine-in-the-middle root certificate through an unauthenticated localhost HTTP and SignalR RPC channel."}], "lastModified": "2026-09-30T16:19:21.907", "sourceIdentifier": "security@progress.com"}