CVE-2026-35565: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Apache Software Foundation Apache Storm UI
CVE-2026-35565 is a stored cross-site scripting (XSS) vulnerability in Apache Storm UI versions prior to 2. 8. 6. The vulnerability arises because topology metadata such as component IDs and stream names are inserted into the UI's HTML without proper sanitization. An authenticated user with topology submission rights can inject malicious scripts that execute in the browsers of operators or administrators viewing the UI, potentially leading to privilege escalation. The issue is fixed in version 2. 8. 6. Until upgrading, users should apply a monkey patch to sanitize inputs and restrict topology submission to trusted users.
AI Analysis
Technical Summary
Apache Storm UI's visualization component improperly neutralizes input during web page generation by directly interpolating topology metadata into HTML via innerHTML without sanitization. This allows an authenticated user with topology submission rights to craft malicious component identifiers containing HTML/JavaScript payloads. These payloads propagate through the system and result in stored XSS in the UI's tooltip rendering. This vulnerability affects versions before 2.8.6 and can lead to script execution in privileged users' browsers in multi-tenant environments.
Potential Impact
Successful exploitation allows an authenticated user with topology submission rights to execute arbitrary scripts in the browsers of operators or administrators accessing the Storm UI. This can lead to privilege escalation within the UI context, potentially compromising administrative sessions or data. The impact is limited to environments where less-trusted users can submit topologies and administrators access the UI.
Mitigation Recommendations
A fixed version, Apache Storm 2.8.6, is available and should be applied to remediate this vulnerability. For users unable to upgrade immediately, a monkey patch is recommended to HTML-escape all API-supplied values before insertion into the UI's tooltip HTML strings. Additionally, restricting topology submission to trusted users via Nimbus ACLs is advised as a defense-in-depth measure. Detailed patching guidance is provided in the 2.8.6 release notes.
CVE-2026-35565: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Apache Software Foundation Apache Storm UI
Description
CVE-2026-35565 is a stored cross-site scripting (XSS) vulnerability in Apache Storm UI versions prior to 2. 8. 6. The vulnerability arises because topology metadata such as component IDs and stream names are inserted into the UI's HTML without proper sanitization. An authenticated user with topology submission rights can inject malicious scripts that execute in the browsers of operators or administrators viewing the UI, potentially leading to privilege escalation. The issue is fixed in version 2. 8. 6. Until upgrading, users should apply a monkey patch to sanitize inputs and restrict topology submission to trusted users.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Apache Storm UI's visualization component improperly neutralizes input during web page generation by directly interpolating topology metadata into HTML via innerHTML without sanitization. This allows an authenticated user with topology submission rights to craft malicious component identifiers containing HTML/JavaScript payloads. These payloads propagate through the system and result in stored XSS in the UI's tooltip rendering. This vulnerability affects versions before 2.8.6 and can lead to script execution in privileged users' browsers in multi-tenant environments.
Potential Impact
Successful exploitation allows an authenticated user with topology submission rights to execute arbitrary scripts in the browsers of operators or administrators accessing the Storm UI. This can lead to privilege escalation within the UI context, potentially compromising administrative sessions or data. The impact is limited to environments where less-trusted users can submit topologies and administrators access the UI.
Mitigation Recommendations
A fixed version, Apache Storm 2.8.6, is available and should be applied to remediate this vulnerability. For users unable to upgrade immediately, a monkey patch is recommended to HTML-escape all API-supplied values before insertion into the UI's tooltip HTML strings. Additionally, restricting topology submission to trusted users via Nimbus ACLs is advised as a defense-in-depth measure. Detailed patching guidance is provided in the 2.8.6 release notes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-04-03T15:14:12.281Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69dcbf1a82d89c981f9a03e8
Added to database: 4/13/2026, 10:02:02 AM
Last enriched: 4/13/2026, 10:16:48 AM
Last updated: 4/13/2026, 11:12:47 AM
Views: 5
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