CVE-2026-20253

Katalog CVE

CVSS 9.8 · Critical KEV · sudah dieksploitasi EPSS 96,9%

Kerentanan Missing Authentication for Critical Function pada splunk. Skor CVSS 3.1 9.8 (Critical) menurut cisco.com. Masuk katalog KEV CISA pada 18 Juni 2026, artinya sudah terbukti dieksploitasi.

Deskripsi (NVD)

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.

Advisory KUTIM-CSIRT

• Peringatan Keamanan: Kerentanan Kritis CVE-2026-20253 pada Splunk Enterprise Berpotensi Eksekusi Kode Jarak Jauh 19 Jun 2026

Rincian

Terbit di NVD

10 Juni 2026

Terakhir diubah

23 Juli 2026

Status NVD

Analyzed

CVSS 3.1

9.8 (Critical), sumber cisco.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-306: Missing Authentication for Critical Function

EPSS (30 hari)

96,9% peluang dieksploitasi; lebih tinggi dari 99,8% CVE lain

Known Exploited Vulnerabilities (CISA)

Nama

Splunk Enterprise Missing Authentication for Critical Function Vulnerability

Masuk KEV

18 Juni 2026

Tenggat CISA

21 Juni 2026 (untuk instansi federal AS)

Ransomware

Belum tercatat

Tindakan wajib

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.

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://advisory.splunk.com/advisories/SVD-2026-0603 mitigasi · advisory vendor
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20253 pemerintah AS
• https://labs.watchtowr.com/why-use-app-level-auth-when-every-database-has-auth-splunk-enterprise-cve-2026-2025... exploit · advisory pihak ketiga