CVE-2026-71802Public exploitNetwork attack vector

Stored XSS via decoded announcement preview HTML

Published Sep 9, 2026 · Updated Sep 9, 2026

Stored XSS in REBUILD 4.4.3 allows remote authenticated users to execute arbitrary JavaScript in viewers' browsers via announcements. The announcement preview's $removeHtml function decodes server-escaped entities with jQuery html().text(), then passes the result to React dangerouslySetInnerHTML for DOM parsing. Publishing access and a victim page view are required; visibility settings determine whether the dashboard, feed, or login page triggers execution.

CVSS severityUnavailable
Unscored
EPSS probability0.16%
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 REBUILD 4.4.3 allows remote authenticated users to execute arbitrary JavaScript in viewers' browsers via announcements. The announcement preview's $removeHtml function decodes server-escaped entities with jQuery html().text(), then passes the result to React dangerouslySetInnerHTML for DOM parsing. Publishing access and a victim page view are required; visibility settings determine whether the dashboard, feed, or login page triggers execution.

The record

CVE
CVE-2026-71802
Published
Sep 9, 2026
Updated
Sep 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

No CVSS assessment is available in this record.

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.

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No observations available

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

Weakness, pattern, technique

T1189Drive-by Compromise

Public exploit references

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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