CVE-2026-20255 (GCVE-0-2026-20255)

Vulnerability from cvelistv5 – Published: 2026-06-10 17:16 – Updated: 2026-06-10 18:25
VLAI
Title
Improper Input Validation through Classic Dashboards in Splunk Enterprise
Summary
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.
Severity
5.7 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-20 - The product does not validate or incorrectly validates input that can affect the control flow or data flow of a program.
Assigner
References
Impacted products
Vendor Product Version
Splunk Splunk Enterprise Affected: 10.2 , < 10.2.4 (custom)
Affected: 10.0 , < 10.0.7 (custom)
Affected: 9.4 , < 9.4.12 (custom)
Affected: 9.3 , < 9.3.13 (custom)
Create a notification for this product.
Splunk Splunk Cloud Platform Affected: 10.3.2512 , < 10.3.2512.13 (custom)
Affected: 10.2.2510 , < 10.2.2510.15 (custom)
Affected: 10.1.2507 , < 10.1.2507.23 (custom)
Affected: 9.3.2411 , < 9.3.2411.132 (custom)
Create a notification for this product.
Date Public
2026-06-10 00:00
Credits
Tony Tong (tongster)
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.