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TI-2026-29639 Aliases CVE-2026-40988GHSA-m69x-pw9p-7j3q

Unbounded DEFLATE Inflation in SAML 2.0 Service Provider

Priority LOW 39CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-400.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00331 26th percentileScored 2026-11-07
Fix Fixed Spring Security (Spring): 5.7.24, 5.8.26, 6.3.17 +3org.springframework.security:spring-security-saml2-service-provider (Maven): 7.0.6, 6.5.11

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
VMwareSpring Security5.7.0 to before 5.7.24; 5.8.0 to before 5.8.26; 6.3.0 to before 6.3.17; 6.4.0 to before 6.4.17; 6.5.0 to before 6.5.10.2; 7.0.0 to before 7.0.5.15.7.24, 5.8.26, 6.3.17, 6.4.17, 6.5.10.2, 7.0.5.1Patch availableCNA
—org.springframework.security:spring-security-saml2-service-provider (Maven)7.0.0 to before 7.0.67.0.6Patch availableGHSA-m69x-pw9p-7j3q
—org.springframework.security:spring-security-saml2-service-provider (Maven)6.5.0 to before 6.5.116.5.11Patch availableGHSA-m69x-pw9p-7j3q
—org.springframework.security:spring-security-saml2-service-provider (Maven)6.4.0 – 6.4.16—No fix listedGHSA-m69x-pw9p-7j3q
—org.springframework.security:spring-security-saml2-service-provider (Maven)6.3.0 – 6.3.16—No fix listedGHSA-m69x-pw9p-7j3q
—org.springframework.security:spring-security-saml2-service-provider (Maven)5.8.0 – 5.8.25—No fix listedGHSA-m69x-pw9p-7j3q
—org.springframework.security:spring-security-saml2-service-provider (Maven)up to 5.7.23—No fix listedGHSA-m69x-pw9p-7j3q
  • Spring Security VendorVMware Affected 5.7.0 to before 5.7.24; 5.8.0 to before 5.8.26; 6.3.0 to before 6.3.17; 6.4.0 to before 6.4.17; 6.5.0 to before 6.5.10.2; 7.0.0 to before 7.0.5.1 Fixed in 5.7.24, 5.8.26, 6.3.17, 6.4.17, 6.5.10.2, 7.0.5.1 Patch available CNA
  • org.springframework.security:spring-security-saml2-service-provider (Maven) Vendor— Affected 7.0.0 to before 7.0.6 Fixed in 7.0.6 Patch available GHSA-m69x-pw9p-7j3q
  • org.springframework.security:spring-security-saml2-service-provider (Maven) Vendor— Affected 6.5.0 to before 6.5.11 Fixed in 6.5.11 Patch available GHSA-m69x-pw9p-7j3q
  • org.springframework.security:spring-security-saml2-service-provider (Maven) Vendor— Affected 6.4.0 – 6.4.16 Fixed in — No fix listed GHSA-m69x-pw9p-7j3q
  • org.springframework.security:spring-security-saml2-service-provider (Maven) Vendor— Affected 6.3.0 – 6.3.16 Fixed in — No fix listed GHSA-m69x-pw9p-7j3q
  • org.springframework.security:spring-security-saml2-service-provider (Maven) Vendor— Affected 5.8.0 – 5.8.25 Fixed in — No fix listed GHSA-m69x-pw9p-7j3q
  • org.springframework.security:spring-security-saml2-service-provider (Maven) Vendor— Affected up to 5.7.23 Fixed in — No fix listed GHSA-m69x-pw9p-7j3q

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:*5.7.0 to before 5.7.24; 5.8.0 to before 5.8.26; 6.3.0 to before 6.3.17; 6.4.0 to before 6.4.17; 6.5.0 to before 6.5.10.2; 7.0.0 to before 7.0.5.1VulnerableVMware
  • cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:* Versions 5.7.0 to before 5.7.24; 5.8.0 to before 5.8.26; 6.3.0 to before 6.3.17; 6.4.0 to before 6.4.17; 6.5.0 to before 6.5.10.2; 7.0.0 to before 7.0.5.1 Vulnerable ·VMware

Remediation

  • Fix · CNA Spring Security (Spring) Fixed in 5.7.24, 5.8.26, 6.3.17, 6.4.17, 6.5.10.2, 7.0.5.1
  • Fix · GHSA-m69x-pw9p-7j3q org.springframework.security:spring-security-saml2-service-provider (Maven) Fixed in 7.0.6 Advisory →
  • Fix · GHSA-m69x-pw9p-7j3q org.springframework.security:spring-security-saml2-service-provider (Maven) Fixed in 6.5.11 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Spring Security 5.7.24, 5.8.26 and 4 more versions

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2026-29654 Unencoded HTML Outputs in Spring Security May Allow Cross-Site ScriptingPriority LOW 33
    • TI-2026-30222 Open Redirect When Using CookieRequestCachePriority LOW 27
    • TI-2026-30211 SAML Payloads Decrypted Without Valid SignaturePriority LOW 23
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-40988
  2. 2026-10-03 Alias added: GHSA-m69x-pw9p-7j3q

References

Advisory 2

Other 3

  • TI-2023-16900 Improper access control in Spring Security CVSS 3.1CRITICAL 9.8
  • TI-2022-13611 Authorization bypass in Spring by VMware CVSS 3.1CRITICAL 9.8
  • TI-2022-07154 Incorrect authorization in Spring Security CVSS 3.1CRITICAL 9.8
  • TI-2026-42404 Spring Security embedded UnboundID LDAP server exposes well-known administrative bind DN on all network interfaces CVSS 3.1CRITICAL 9.4
  • TI-2026-18257 Under Some Conditions Spring Security HTTP Headers Are not Written CVSS 3.1CRITICAL 9.1
  • TI-2014-02853 Improper authentication in Pivotal Spring Security CVSS 3.0CRITICAL 9.8
See all 43 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences