What is CVE-2026-28298?

CVE-2026-28298 is a medium-severity vulnerability in Solarwinds Observability Self-Hosted, classified under Cross-site Scripting. CVSS score: 5.9/10. Published 2026-03-26.

How severe is CVE-2026-28298?

Medium severity. CVSS v3 base score is 5.9 out of 10.

XSS in Solarwinds Observability Self-Hosted

CVE-2026-28298

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-03-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.003 (27.9th percentile), scored 2026-09-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Solarwinds Observability Self-Hosted
Solarwinds Observability Self-Hosted — versions 2026.1.1 and previous versions

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.solarwinds.com/trust-center/security-advisories/CVE-2026-28298 (Vendor Advisory)
documentation.solarwinds.com/en/success_center/orionplatform/content/release_no… (Release Notes)

Frequently asked questions

What is CVE-2026-28298?: CVE-2026-28298 is a medium-severity vulnerability in Solarwinds Observability Self-Hosted, classified under Cross-site Scripting. CVSS score: 5.9/10. Published 2026-03-26.
How severe is CVE-2026-28298?: Medium severity. CVSS v3 base score is 5.9 out of 10.