Authenticated response disclosure via CORS and JSONP
Published Sep 14, 2026 · Updated Sep 14, 2026
Information disclosure in Apache Storm Webapp 3.0.0 allows remote attackers to read authenticated API responses through a victim's browser. The Logviewer reflects untrusted Origin values while allowing credentials, the shared CORS filter applies credential-permitting defaults, and UI and Logviewer GET handlers wrap responses in caller-selected JSONP callbacks. Exploitation requires an authenticated operator to visit an attacker-controlled origin; exposed data includes cluster, topology, and log information.
Summary
What happened
Information disclosure in Apache Storm Webapp 3.0.0 allows remote attackers to read authenticated API responses through a victim's browser. The Logviewer reflects untrusted Origin values while allowing credentials, the shared CORS filter applies credential-permitting defaults, and UI and Logviewer GET handlers wrap responses in caller-selected JSONP callbacks. Exploitation requires an authenticated operator to visit an attacker-controlled origin; exposed data includes cluster, topology, and log information.
The record
- CVE
- CVE-2026-82438
- Published
- Sep 14, 2026
- Updated
- Sep 14, 2026
- Vendor
- Apache Software Foundation
- Product
- Apache Storm Webapp
- Classifications
- T1189
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 14, 2026CVE publishedPublication date reported by the CVE source.
- Sep 14, 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.
- Affected versionversion=3.0.0 <3.1.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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