CVE-2026-20256
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Improper Input Validation through Protocol-Relative URL in Classic Dashboards in Splunk Enterprise
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 cause data exfiltration through classic dashboards by redirecting a victim to an external site using a protocol-relative URL in a drill-down link.<br><br>The vulnerability exists because the URL classifier in classic dashboards only recognizes `http://` and `https://` schemes when checking for external URLs. Protocol-relative URLs such as `//attacker.com` bypass this check entirely, and Splunk Web does not show the external-navigation warning dialog to the victim.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Splunk Enterprise
- Vendor
- Splunk
- Product
- Splunk Enterprise
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 10.2 | affected | custom | 10.2.4 | Unavailable | None listed |
| 10.0 | affected | custom | 10.0.7 | Unavailable | None listed |
| 9.4 | affected | custom | 9.4.12 | Unavailable | None listed |
| 9.3 | affected | custom | 9.3.13 | Unavailable | None listed |
Splunk Cloud Platform
- Vendor
- Splunk
- Product
- Splunk Cloud Platform
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 10.3.2512 | affected | custom | 10.3.2512.13 | Unavailable | None listed |
| 10.2.2510 | affected | custom | 10.2.2510.15 | Unavailable | None listed |
| 10.1.2507 | affected | custom | 10.1.2507.23 | Unavailable | None listed |
| 9.3.2411 | affected | custom | 9.3.2411.132 | Unavailable | None listed |