{"uuid": "7d421877-02d2-42a0-9d46-1a670376df27", "vulnerability": {"vulnId": "CVE-2026-20253", "altId": []}, "gcve": {"origin_uuid": "405284c2-e461-4670-8979-7fd2c9755a60", "object_uuid": "7d421877-02d2-42a0-9d46-1a670376df27"}, "status": {"exploited": true, "status_reason": "confirmed", "status_updated_at": "2026-06-18T00:00:00+00:00"}, "timestamps": {"asserted_at": "2026-06-18T00:00:00+00:00", "recorded_at": "2026-06-18T17:00:01+00:00", "first_seen_at": "2026-06-18T00:00:00+00:00"}, "scope": {"notes": "KEV entry: Splunk Enterprise Missing Authentication for Critical Function Vulnerability | Affected: Splunk / Enterprise | Description: Splunk Enterprise contains a missing authentication for critical function vulnerability which could allow an unauthenticated user to create or truncate arbitrary files through a PostgreSQL sidecar service endpoint. | Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA\u2019s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA\u2019s \u201cForensics Triage Requirements\u201d (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. | Due date: 2026-06-21 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://advisory.splunk.com/advisories/SVD-2026-0603 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-20253"}, "evidence": [{"type": "vendor_report", "source": "cisa-kev", "signal": "successful_exploitation", "confidence": 0.8, "details": {"cwes": ["CWE-306"], "feed": "CISA Known Exploited Vulnerabilities Catalog", "product": "Enterprise", "due_date": "2026-06-21", "date_added": "2026-06-18", "vendorProject": "Splunk", "vulnerabilityName": "Splunk Enterprise Missing Authentication for Critical Function Vulnerability", "knownRansomwareCampaignUse": "Unknown"}}], "references": [{"id": "CVE-2026-20253", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-20253"}]}