Credential disclosure via cross-origin WebSocket redirects
Published Aug 26, 2026 · Updated Aug 26, 2026
Open redirect in affected Spring Reactor Netty releases allows remote attackers to obtain client credentials via cross-origin WebSocket redirects. The WebSocket client's handshake-redirect path carries credentials from the original request to a redirect target on a different origin instead of stripping them. Exposure requires an application to use 1.0.52 and earlier, 1.1.0 through 1.2.18, or 1.3.0 through 1.3.6 and explicitly enable HTTP redirects.
Summary
What happened
Open redirect in affected Spring Reactor Netty releases allows remote attackers to obtain client credentials via cross-origin WebSocket redirects. The WebSocket client's handshake-redirect path carries credentials from the original request to a redirect target on a different origin instead of stripping them. Exposure requires an application to use 1.0.52 and earlier, 1.1.0 through 1.2.18, or 1.3.0 through 1.3.6 and explicitly enable HTTP redirects.
The record
- CVE
- CVE-2026-47848
- Published
- Aug 26, 2026
- Updated
- Aug 26, 2026
- Vendor
- Spring
- Product
- Reactor Netty
- Classifications
- CWE-601
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 26, 2026CVE publishedPublication date reported by the CVE source.
- Aug 26, 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=0 <=1.0.52
- Affected versionversion=1.1.0 <=1.2.18
- Affected versionversion=1.3.0 <=1.3.6
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
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Technologies
Your stack
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Your stack
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