{"id":"CVE-2026-20253","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-20253","summary":"In Splunk Enterprise 10.2 versions below 10.2.4 and 10 versions below 10.0.7, an unauthenticated user could create or truncate arbitrary files through a PostgreSQL sidecar service endpoint.…","details":"In Splunk Enterprise 10.2 versions below 10.2.4 and 10 versions below 10.0.7, an unauthenticated user could create or truncate arbitrary files through a PostgreSQL sidecar service endpoint. The vulnerability exists because the PostgreSQL sidecar service endpoint lacks authentication controls, allowing any network-reachable user to invoke file operations without credentials. Splunk Enterprise versions 9.4 and earlier are not affected. If you cannot immediately upgrade to a fixed version, you can mitigate this vulnerability by disabling the PostgreSQL sidecar service.","published":"2026-06-10T18:16:40.760","modified":"2026-07-23T09:10:00.113","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.96939,"percentile":0.99887,"asOf":"2026-09-16"},"cisaKev":null,"exploitsKnown":2,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://advisory.splunk.com/advisories/SVD-2026-0603"},{"type":"EXPLOIT","url":"https://labs.watchtowr.com/why-use-app-level-auth-when-every-database-has-auth-splunk-enterprise-cve-2026-20253-pre-auth-rce/"},{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20253"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-07-23T09:10:00.113"}}