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  4. CVE 2026 28330 solarwinds observability self hosted cross site
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Back to active CVEs
Medium · CVSS 4.6CVE-2026-28330

SolarWinds Observability Self-Hosted Cross-Site Scripting VulnerabilityCVE-2026-28330

Answer in brief

CVE-2026-28330 records a Medium severity (CVSS 4.6) vulnerability in SolarWinds Observability Self-Hosted Cross-Site Scripting Vulnerability. The current sources do not mark it as known exploited. The current feed maps SolarWinds/SolarWinds Observability Self-Hosted (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 20, 2026Updated Oct 20, 2026Source checked Oct 20, 2026First seen by HOL Oct 20, 2026Material review Oct 20, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 4.6
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 4.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps SolarWinds/SolarWinds Observability Self-Hosted (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
SolarWinds/SolarWinds Observability Self-Hostedgeneric2026.2.3 and all previous versionsNot reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for SolarWinds/SolarWinds Observability Self-Hosted.
  2. 2Review the reported fix. Source-reported solution: SolarWinds recommends customers to upgrade to Observability Self-Hosted version 2026.4 as soon as is practical.

Evidence timeline and material changes

  1. Published upstream

    Oct 20, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 20, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 20, 2026

Sources and claim methodology

  • Source referencedocumentation.solarwinds.com
  • Source referencedocumentation.solarwinds.com
  • Source referencesolarwinds.com
Upstream source description

SolarWinds Observability Self-Hosted was found to be affected by a stored Cross-Site Scripting (XSS) vulnerability that allows authenticated attackers to inject malicious content or JavaScript, which is displayed or executed in the browsers of other authenticated users who access the affected pages.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • SolarWinds Observability Self-Hosted broken authorization schemaSame solarwinds/solarwinds observability self-hosted package
  • SolarWinds Observability Self-Hosted Server-Side Request Forgery (SSRF)Same solarwinds/solarwinds observability self-hosted package
  • ApostropheCMS: Stored XSS via Unescaped Widget Style Attribute SerializationAlso CWE-79
  • ApostropheCMS sanitize-html: nonTextTags discard region ends early on an implied close, letting <noscript> content renderAlso CWE-79
  • ApostropheCMS sanitize-html: SMIL animation namespace-prefix bypass allows javascript: URI injection (XSS)Also CWE-79
  • ApostropheCMS: Client-side Prototype Pollution in apos.http.parseQuery leading to DOM-based XSS against authenticated usersAlso CWE-79

Record context

Vulnerability class
XSS
EPSS
Not reported
CWE IDs
CWE-79
Source
CVE List V5
Source checked
Oct 20, 2026
References
3 linked sources
Open source record