CVE-2026-28298: SolarWinds Observability Self-Hosted Stored Cross-Site Scripting Vulnerability

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-26 · updated 2026-06-17
Weakness: CWE-79

Description

SolarWinds Observability Self-Hosted was found to be affected by a stored cross-site scripting vulnerability, which when exploited, can lead to unintended script execution.

Affected products

SolarWinds Observability Self-Hosted: before 2026.1.1 — fixed in 2026.1.1

How to fix

Upgrade to a fixed version: SolarWinds Observability Self-Hosted 2026.1.1. Check the vendor advisory for mitigations.

References

https://documentation.solarwinds.com/en/success_center/orionplatform/content/release_notes/hco_2026-1-1_release_notes.htm
https://www.solarwinds.com/trust-center/security-advisories/CVE-2026-28298

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