Signature wrapping vulnerability in Spring Security
Spring Security versions 5.2.x prior to 5.2.4 and 5.3.x prior to 5.3.2 contain a signature wrapping vulnerability during SAML response validation. When using the spring-security-saml2-service-provider component, a malicious user can carefully modify an otherwise valid SAML response and append an arbitrary assertion that Spring Security will accept as valid.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.springframework.security:spring-security-core | >= 5.2.0, < 5.2.4, >= 5.3.0, < 5.3.2 | 5.2.4, 5.3.2 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2020-5407
- https://lists.apache.org/thread.html/r73af928cf64bebf78b7fa4bc56a5253273ec7829f5f5827f64c72fc7@%3Cissues.servicemix.apache.org%3E
- https://lists.apache.org/thread.html/ra19a4e7236877fe12bfb52db07b27ad72d9e7a9f5e27bba7e928e18a@%3Cdev.geode.apache.org%3E
- https://lists.apache.org/thread.html/rd99601fbca514f214f88f9e53fd5be3cfbff05b350c994b4ec2e184c@%3Cdev.geode.apache.org%3E
- https://tanzu.vmware.com/security/cve-2020-5407
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://www.oracle.com/security-alerts/cpujan2021.html
- https://www.oracle.com/security-alerts/cpuoct2020.html
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-347- Platform
- Java / Kotlin (Maven)
- Package
org.springframework.security:spring-security-core- Disclosed
- 05.06.2020
- Updated
- 11.10.2026 11:21
Sources and licenses
OSV / GitHub Advisory Database - GHSA-48rw-j489-928m - CC BY 4.0
Vulnerability history: org.springframework.security:spring-security-core
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
- 31
- First → latest
- 10.2018 04.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 4
- High 11
- Medium 15
- Low 1
Disclosures per year
- 2018: 3
- 2019: 2
- 2020: 4
- 2021: 1
- 2022: 10
- 2023: 1
- 2024: 4
- 2025: 3
- 2026: 3
-
Signature wrapping vulnerability in Spring Security this entry
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