Unauthenticated Arbitrary File Creation and Truncation in a PostgreSQL Sidecar Service Endpoint in Splunk Enterprise
Published Jun 10, 2026 ·Due Jun 21, 2026
9.8
CRITICALCVSS 3.1
EPSS 96.94%
Description
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.
Affected products
-
- Version 10.0StatusaffectedConstraints<10.0.7
- Version 10.2StatusaffectedConstraints<10.2.4
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Splunk | Splunk Enterprise | n/a |
|
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
Date Added
Jun 18, 2026
Patch Due
Jun 21, 2026
Required Action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
ActiveAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed Jun 18, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Jun–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (7 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 96.94% (0.96939) | 99.89th | v5 (v2026.06.15) |
| Jul 24, 2026 | 96.23% (0.96225) | 99.87th | v5 (v2026.06.15) |
| Jun 27, 2026 | 88.17% (0.88171) | 99.75th | v5 (v2026.06.15) |
| Jun 23, 2026 | 92.10% (0.92100) | 99.81th | v5 (v2026.06.15) |
| Jun 19, 2026 | 10.04% (0.10035) | 95.02th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.68% (0.01681) | 73.87th | v5 (v2026.06.15) |
| Jun 11, 2026 | 0.07% (0.00067) | 20.89th | v4 (v2025.03.14) |
References (3)
- https://advisory.splunk.com/advisories/SVD-2026-0603 MitigationVendor Advisory
- https://labs.watchtowr.com/why-use-app-level-auth-when-every-database-has-auth-splunk-enterprise-cve-2026-20253-pre-auth-rce/ exploitThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20253 government-resourceUS Government Resource
| Link | Providers | Tags |
|---|---|---|
| https://advisory.splunk.com/advisories/SVD-2026-0603 | MitigationVendor Advisory | |
| https://labs.watchtowr.com/why-use-app-level-auth-when-every-database-has-auth-splunk-enterprise-cve-2026-20253-pre-auth-rce/ | exploitThird Party Advisory | |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20253 | government-resourceUS Government Resource |
Change history (0)
No recorded changes yet.