Critical Unauthenticated Remote Code Execution in Splunk Enterprise (CVE-2026-20253)
IntroductionSplunk disclosed a critical unauthenticated remote code execution (RCE) vulnerability in Splunk Enterprise tracked as CVE-2026-20253 on June 10, 2026. The vulnerability has a CVSS score of 9.8 and stems from missing authentication on a PostgreSQL sidecar service recovery endpoint that can be reached through the Splunk Web interface, which proxies requests to the internal PostgreSQL sidecar service without enforcing authentication. A successful attacker can create or truncate arbitrary files and ultimately achieve arbitrary code execution under the Splunk service account.On June 12, 2026, watchTowr Labs published a technical deep-dive and proof-of-concept analysis. On June 18, 202
- Vendor
- Splunk
- Product
- PostgreSQL, Splunk Enterprise / SOAR
- CVSS
- 9.8
- Exploitation
- observed in the wild
- Exposure class
- Database, Network management
Why it ranks 64 (High)
- Exploitation observed in the wild
- CVSS 9.8 critical
- Product class: database, network management
- Covered by 3 independent sources
- Threat research
- Recency: items published within 24 hours gain 15, within 72 hours 6, within 7 days 2.
Links
- Zscaler ThreatLabz (zscaler.com)
- CVE-2026-20253 on this site · NVD · CVE.org · Vulnpedia
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