CVE-2026-20139

mediumpriority · track · 2EPSS 0.057 · 93 %ileDEEUNLUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

5.68% (93rd) EPSS

CVSS 4.3 · medium

Is it mine?

39 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · ncsc_nl

EPSS · scored 2026-10-24

In Splunk Enterprise versions below 10.2.0, 10.0.2, 9.4.8, 9.3.9, and 9.2.12, and Splunk Cloud Platform versions below 10.2.2510.3, 10.1.2507.8, 10.0.2503.9, and 9.3.2411.121, a low-privileged user that does not hold the "admin" or "power" Splunk roles could craft a malicious payload into the `realname`, `tz`, or `email` parameters of the `/splunkd/__raw/services/authentication/users/username` REST API endpoint when they change a password. This could potentially lead to a client‑side denial‑of‑service (DoS). The malicious payload might significantly slow page load times or render Splunk Web temporarily unresponsive.

cvss

Technical severity, 0–10. One row per scoring source.

4.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Lsecondary · ENISA EU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Lsecondary · psirt@cisco.com USexploitability 2.8 · impact 1.4

v3.14mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:Usecondary · CVSS-BT (t0sche)

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Lsecondary · NCSC-NL NL

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-400USCWE-400US

affected products (39)

Products and version ranges known to be affected.

Splunk Splunk Enterprise <10.0.2all versionscert_bundDE
Splunk Splunk Enterprise <10.2.0all versionscert_bundDE
Splunk Splunk Enterprise <9.2.11all versionscert_bundDE
Splunk Splunk Enterprise <9.2.12all versionscert_bundDE
Splunk Splunk Enterprise <9.2.9all versionscert_bundDE
Splunk Splunk Enterprise <9.3.7all versionscert_bundDE
Splunk Splunk Enterprise <9.3.8all versionscert_bundDE
Splunk Splunk Enterprise <9.3.9all versionscert_bundDE
Splunk Splunk Enterprise <9.4.5all versionscert_bundDE
Splunk Splunk Enterprise <9.4.7all versionscert_bundDE
Splunk Splunk Enterprise <9.4.8all versionscert_bundDE
Splunk Splunk Enterprise< 10.0.2cert_bundDE
Splunk Splunk Enterprise< 10.2.0cert_bundDE
Splunk Splunk Enterprise< 9.2.11cert_bundDE
Splunk Splunk Enterprise< 9.2.12cert_bundDE
Splunk Splunk Enterprise< 9.2.9cert_bundDE
Splunk Splunk Enterprise< 9.3.7cert_bundDE
Splunk Splunk Enterprise< 9.3.8cert_bundDE
Splunk Splunk Enterprise< 9.3.9cert_bundDE
Splunk Splunk Enterprise< 9.4.5cert_bundDE

showing 20 of 39

advisories (2)

Vendor and ecosystem advisories describing this.

NCSC-2026-0068Kwetsbaarheden verholpen in Splunk Enterprise en Splunk Cloud PlatformNL2026-02-23csaf · ncsc_nlNL
Splunk heeft kwetsbaarheden verholpen in Splunk Enterprise en Splunk Cloud Platform.
WID-SEC-W-2026-0457Splunk Splunk Enterprise: Mehrere SchwachstellenDeutsch2026-02-18csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Splunk Splunk Enterprise ausnutzen, um Root-Rechte zu erlangen, beliebigen Code mit Systemrechten auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand zu verursachen. Informationen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund ncsc_nl NVD CVE.org MITRE

published 2026-02-18modified 2026-06-17

references (3)

External citations — patches, advisories, analysis.

scry

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