PT-2026-48305 · Spring · Spring Security

Published 2026-06-09 · Updated 2026-06-10 · CVE-2026-40988

Mitre

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Fix

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

CVE-2026-40988

Affected Products

Spring Security

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-40988 · Security Note
• https://spring.io/security/cve-2026-40988 · Note