CVE-2026-20253

CVE-2026-20253 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added June 18, 2026. EIP tracks 3 public exploits from researchers including watchtowrlabs, HORKimhab, 0xBlackash. A Nuclei detection template is also available.

AI-analyzed exploit summary The repository contains a Python script that checks for the presence of CVE-2026-20253 by probing the `/v1/postgres/recovery/backup` endpoint in Splunk's PostgreSQL Sidecar Service. It does not exploit the vulnerability but detects potential exposure based on HTTP response codes.

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.