CVE-2026-20253

Published Jun 10, 2026

Last updated 4 days ago

Overview

AI description

Automated description summarized from trusted sources.

CVE-2026-20253 is a vulnerability affecting Splunk Enterprise and Splunk Cloud Platform, stemming from a lack of authentication controls in the PostgreSQL sidecar service endpoint. This flaw permits any network-reachable, unauthenticated user to perform file operations, specifically creating or truncating arbitrary files on the affected system. The vulnerability exists in Splunk Enterprise versions below 10.2.4 and 10.0.7, and Splunk Cloud Platform versions below 10.4.2604.3 and 10.2.2510.14. This unauthenticated file manipulation can potentially lead to unauthorized data tampering or disruption of service.

Description: In Splunk Enterprise versions below 10.2.4 and 10.0.7, and Splunk Cloud Platform versions below 10.4.2604.3 and 10.2.2510.14, an unauthenticated user could create or truncate arbitrary files through a PostgreSQL sidecar service endpoint.<br><br>The vulnerability exists because the PostgreSQL sidecar service endpoint lacks authentication controls, allowing any network-reachable user to invoke file operations without credentials.
Source: psirt@cisco.com
NVD status: Undergoing Analysis

Risk scores

CVSS 3.1

Type: Primary
Base score: 9.8
Impact score: 5.9
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: CRITICAL

Weaknesses

psirt@cisco.com: CWE-306

Hype score: Not currently trending

References