Spring Security SAML2 Service Provider: Unbounded writer inflates the compressed SAML payload into memory (DoS)
An application using spring-security-saml2-service-provider and the REDIRECT binding for SAML 2.0 Login or Logout may be vulnerable to a denial of service by way of an unbounded writer that inflates the compressed SAML payload into memory.
Affected versions: Spring Security 5.7.0 through 5.7.23; 5.8.0 through 5.8.25; 6.3.0 through 6.3.16; 6.4.0 through 6.4.16; 6.5.0 through 6.5.10; 7.0.0 through 7.0.5.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.springframework.security:spring-security-saml2-service-provider | >= 7.0.0, < 7.0.6, >= 6.5.0, < 6.5.11, >= 6.4.0, <= 6.4.16, >= 6.3.0, <= 6.3.16, >= 5.8.0, <= 5.8.25, <= 5.7.23 | 7.0.6, 6.5.11 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-400- Platform
- Java / Kotlin (Maven)
- Package
org.springframework.security:spring-security-saml2-service-provider- Disclosed
- 10.06.2026
- Updated
- 11.10.2026 12:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-m69x-pw9p-7j3q - CC BY 4.0
Vulnerability history: org.springframework.security:spring-security-saml2-service-provider
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 4
- First → latest
- 06.2026 06.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 3
- Low 1
Disclosures per year
- 2026: 4
-
Spring Security SAML2 Service Provider: Unbounded writer inflates the compressed SAML payload into memory (DoS) this entry
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