Credential disclosure via HTTP/2 redirect state loss
Published Jul 16, 2025 · Updated Jun 23, 2026
Credential disclosure in Spring Reactor Netty HTTP before 1.2.8 and 1.3.0-M1 through 1.3.0-M4 allows remote attackers to steal credentials. During an HTTP/1.1-to-HTTP/2 upgrade, a new stream fails to inherit the parent connection's sent-header and sent-body state, so later redirect handling replays authentication data. Exposure requires explicit redirect following and a crafted redirect chain; leaked credentials grant the receiving endpoint whatever access those credentials authorize.
Summary
What happened
Credential disclosure in Spring Reactor Netty HTTP before 1.2.8 and 1.3.0-M1 through 1.3.0-M4 allows remote attackers to steal credentials. During an HTTP/1.1-to-HTTP/2 upgrade, a new stream fails to inherit the parent connection's sent-header and sent-body state, so later redirect handling replays authentication data. Exposure requires explicit redirect following and a crafted redirect chain; leaked credentials grant the receiving endpoint whatever access those credentials authorize.
The record
- CVE
- CVE-2025-22227
- Published
- Jul 16, 2025
- Updated
- Jun 23, 2026
- Vendor
- Spring
- Product
- Reactor Netty
- Classifications
- CWE-200
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 16, 2025CVE publishedPublication date reported by the CVE source.
- Jun 23, 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=1.0.x <1.0.49 (Reactor BOM 2020.0.48)
- Affected versionversion=1.1.x <1.1.32 (Reactor BOM 2022.0.27 and 2023.0.20)
- Affected versionversion=1.2.x <1.2.8 (Reactor BOM 2024.0.8)
- Affected versionversion=1.3.x <1.3.0-M5 (Reactor BOM 2025.0.0-M5)
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
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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