CVE-2026-28298

Stored script execution via undisclosed input handling

Published Mar 26, 2026 · Updated Mar 26, 2026

Stored XSS in SolarWinds Observability Self-Hosted 2026.1 and earlier allows remote authenticated users to execute scripts in a user's browser. SolarWinds has not disclosed the affected input, storage location, or output-rendering operation that fails to neutralize the stored content. Exploitation requires high privileges, adjacent-network access, and user interaction; confidentiality and integrity are affected, not availability.

CVSS severity5.9
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in SolarWinds Observability Self-Hosted 2026.1 and earlier allows remote authenticated users to execute scripts in a user's browser. SolarWinds has not disclosed the affected input, storage location, or output-rendering operation that fails to neutralize the stored content. Exploitation requires high privileges, adjacent-network access, and user interaction; confidentiality and integrity are affected, not availability.

The record

CVE
CVE-2026-28298
Published
Mar 26, 2026
Updated
Mar 26, 2026
Vendor
SolarWinds
Product
SolarWinds Observability Self-Hosted
Classifications
CWE-79, CAPEC-63, T1203
Attack vector
adjacent
Privileges
admin

Timeline

How it unfolded

  1. Mar 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2026.1.1 and previous versions

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesadmin

What is affected?

SolarWinds · SolarWinds Observability Self-Hostedversion=2026.1.1 and previous versions

Published CVSS scores

5.9SolarWindsCVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N
8.1NVDCVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-63Cross-Site Scripting (XSS)
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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