CVE Watch23 de jul. de 2026

CVE-2026-20253

Splunk Enterprise Missing Authentication for Critical Function Vulnerability

CVSS

9.8

Crítica

EPSS

96.9%

p100

KEV

SIM

18 de jun. de 2026

Exploit Today

0-100

Publicado: 10 de jun. de 2026 · Última mod.: 23 de jul. de 2026 · CWE-306

EPSS · 30d

96.9%EPSS · 30 dias96.9%

2026-10-082026-11-05

Ficha do catálogo KEV

Produto

Splunk / Enterprise

Vulnerabilidade

Splunk Enterprise Missing Authentication for Critical Function Vulnerability

Adicionado ao KEV

18 de jun. de 2026

Corrigir até

21 de jun. de 2026

Uso conhecido em ransomware

Não

Descrição resumida

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.

Ação necessária

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.

Notas

https://advisory.splunk.com/advisories/SVD-2026-0603 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-20253

Descrição técnica

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.

Referências oficiais

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