CVE-2026-40988
Last modified
CVE-2026-40988 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.33% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Vmware | Spring Security | >= 5.7.0, < 5.7.24 |
| Vmware | Spring Security | >= 5.8.0, < 5.8.26 |
| Vmware | Spring Security | >= 6.3.0, < 6.3.17 |
| Vmware | Spring Security | >= 6.4.0, < 6.4.17 |
| Vmware | Spring Security | >= 6.5.0, < 6.5.10.2 |
| Vmware | Spring Security | >= 7.0.0, < 7.0.5.1 |
References
- https://spring.io/security/cve-2026-40988Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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