Authenticated information disclosure via WebSocket handshake race
Published Sep 14, 2026 · Updated Sep 14, 2026
Race condition in Navigator on IBMi 7.3 through 7.6 allows remote authenticated users to obtain sensitive information. IBM identifies the WebSocket handshake as the racing locus but does not disclose which shared state or operation lacks synchronization. Exploitation requires a valid session and timing control; the reported consequence is limited to information disclosure.
Summary
What happened
Race condition in Navigator on IBMi 7.3 through 7.6 allows remote authenticated users to obtain sensitive information. IBM identifies the WebSocket handshake as the racing locus but does not disclose which shared state or operation lacks synchronization. Exploitation requires a valid session and timing control; the reported consequence is limited to information disclosure.
The record
- CVE
- CVE-2026-18151
- Published
- Sep 14, 2026
- Updated
- Sep 14, 2026
- Vendor
- IBM
- Product
- IBM i
- Classifications
- CWE-362, T1190
- Attack vector
- network
- Privileges
- authenticated
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=7.3
- Affected versionversion=7.4
- Affected versionversion=7.5
- Affected versionversion=7.6
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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