CVE-2026-28325: SolarWinds Observability Self-Hosted Unauthenticated Remote Code Execution Vulnerability

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-22 · updated 2026-09-24
Weakness: CWE-502

Description

SolarWinds Observability Self-Hosted was found to be affected by an unauthenticated remote code execution vulnerability stemming from deserialization of untrusted data when the application is configured to use a specific communication mode.

Affected products

SolarWinds Observability Self-Hosted: before 2026.2.3 — fixed in 2026.2.3

How to fix

Upgrade to a fixed version: SolarWinds Observability Self-Hosted 2026.2.3. Check the vendor advisory for mitigations.

References

https://documentation.solarwinds.com/en/success_center/orionplatform/content/core-secure-configuration.htm
https://documentation.solarwinds.com/en/success_center/orionplatform/content/release_notes/hco_2026-2-3_release_notes.htm
https://www.solarwinds.com/trust-center/security-advisories/CVE-2026-28325

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