Splunk Enterprise Missing Authentication for Critical Function Vulnerability

Splunk Enterprise

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. Added to CISA KEV on 2026-06-18 (federal deadline 2026-06-21).

First seen: 18 Jun 2026
Last update: 18 Jun 2026, 12:00 UTC
Identifiers: CVE-2026-20253
Source: CISA KEV
On the menu as: Postgres

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## Splunk Enterprise Missing Authentication for Critical Function Vulnerability
Severity: high, exploited in the wild. Patch status: patched.
Affected: Splunk Enterprise
Ids: CVE-2026-20253

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. Added to CISA KEV on 2026-06-18 (federal deadline 2026-06-21).

## Steps
1. Search the repo, its CI and infra config for Splunk Enterprise. If present, report the version in use and whether it's affected.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-20253") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://advisory.splunk.com/advisories/SVD-2026-0603 https://nvd.nist.gov/vuln/detail/CVE-2026-20253
https://pwned.coffee/i/splunk-enterprise-missing-authentication-for-critical-fu-cve-2026-20253

Sources

Totalone hot coffee