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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-40988

32
FAUCET Score

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.

First published: Jun 9, 2026Last modified: Jun 27, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.7.0, < 5.7.24CPE matchmatch criteria
cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:*
>= 5.8.0, < 5.8.26CPE matchmatch criteria
cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:*
>= 6.3.0, < 6.3.17CPE matchmatch criteria
cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:*
>= 6.4.0, < 6.4.17CPE matchmatch criteria
cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:*
>= 6.5.0, < 6.5.10.2CPE matchmatch criteria
cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.33%
Probability of exploitation in next 30 days
EPSS Percentile
25.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0033 is in the 7th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

spring.io / security/cve-2026-40988
Vendor Advisory