CVE-2026-20255

Name: CVE-2026-20255
Creator: NVD / NIST
Published: 2026-06-10T18:16:41.01+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.7/10EPSS 0.24%

Last modified Jun 17, 2026

CVE-2026-20255 is a medium-severity vulnerability rated 5.7/10 on the CVSS scale. In Splunk Enterprise versions below 10.2.4, 10.0.7, 9.4.12, and 9.3.13, and Splunk Cloud Platform versions below 10.3.2512.13, 10.2.2510.15, 10.1.2507.23, and 9.3.2411.132, a low-privileged user that does not hold the "admin" or "power" Splunk roles could craft a malicious classic dashboard that exfiltrates sensitive data to an external server. The vulnerability exists because URL validation on the external content dialog is incomplete, which can allow for requests to untrusted domains when a user interacts with a crafted dashboard.. EPSS estimates a 0.24% chance of exploitation in the next 30 days.

Description

In Splunk Enterprise versions below 10.2.4, 10.0.7, 9.4.12, and 9.3.13, and Splunk Cloud Platform versions below 10.3.2512.13, 10.2.2510.15, 10.1.2507.23, and 9.3.2411.132, a low-privileged user that does not hold the "admin" or "power" Splunk roles could craft a malicious classic dashboard that exfiltrates sensitive data to an external server. The vulnerability exists because URL validation on the external content dialog is incomplete, which can allow for requests to untrusted domains when a user interacts with a crafted dashboard.

Metrics

CVSS 3.1

5.7/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

EPSS Probability

0.24%

15.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Splunk	Splunk	>= 9.3.0, < 9.3.13
Splunk	Splunk	>= 9.4.0, < 9.4.12
Splunk	Splunk	>= 10.0.0, < 10.0.7
Splunk	Splunk	>= 10.2.0, < 10.2.4
Splunk	Splunk Cloud Platform	>= 9.3.2411, < 9.3.2411.132
Splunk	Splunk Cloud Platform	>= 10.1.2507, < 10.1.2507.23
Splunk	Splunk Cloud Platform	>= 10.2.2510, < 10.2.2510.15
Splunk	Splunk Cloud Platform	>= 10.3.2512, < 10.3.2512.13

References

https://advisory.splunk.com/advisories/SVD-2026-0605Vendor Advisory

Timeline

Published: Jun 10, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-20255?

How severe is CVE-2026-20255?

CVE-2026-20255 has a CVSS score of 5.7/10 (MEDIUM severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.

How do I fix CVE-2026-20255?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-20255?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST