CVE-2026-20255 | THREATINT

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.

PUBLISHED Reserved 2025-10-08 | Published 2026-06-10 | Updated 2026-06-10 | Assigner cisco

MEDIUM: 5.7CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

Problem types

The product does not validate or incorrectly validates input that can affect the control flow or data flow of a program.

Product status

10.2 (custom) before 10.2.4

affected

10.0 (custom) before 10.0.7

affected

9.4 (custom) before 9.4.12

affected

9.3 (custom) before 9.3.13

affected

10.3.2512 (custom) before 10.3.2512.13

affected

10.2.2510 (custom) before 10.2.2510.15

affected

10.1.2507 (custom) before 10.1.2507.23

affected

9.3.2411 (custom) before 9.3.2411.132

affected

Credits

Tony Tong (tongster)

References

advisory.splunk.com/advisories/SVD-2026-0605

cve.org (CVE-2026-20255)

nvd.nist.gov (CVE-2026-20255)

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