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.
Published: 2026-06-09
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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References
History

Fri, 12 Jun 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Vmware
Vmware spring Security
CPEs cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:*
Vendors & Products Vmware
Vmware spring Security

Wed, 10 Jun 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 10 Jun 2026 03:30:00 +0000

Type Values Removed Values Added
First Time appeared Spring
Spring spring Security
Vendors & Products Spring
Spring spring Security

Wed, 10 Jun 2026 00:00:00 +0000

Type Values Removed Values Added
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.
Title Unbounded DEFLATE Inflation in SAML 2.0 Service Provider
Weaknesses CWE-400
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Subscriptions

Spring Spring Security
Vmware Spring Security
cve-icon MITRE

Status: PUBLISHED

Assigner: vmware

Published:

Updated: 2026-06-27T21:22:39.249Z

Reserved: 2026-04-16T02:19:09.389Z

Link: CVE-2026-40988

cve-icon Vulnrichment

Updated: 2026-06-10T18:08:34.655Z

cve-icon NVD

Status : Analyzed

Published: 2026-06-10T00:16:49.527

Modified: 2026-06-12T20:38:02.607

Link: CVE-2026-40988

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-10T03:15:20Z

Weaknesses