CVE-2026-40988: Unbounded DEFLATE Inflation in SAML 2.0 Service Provider
Spring · Spring Security
Vendor fix available · Affected: Spring Security · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 26% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Spring · Spring Securityfrom 5.7.0 before 5.7.24; from 5.8.0 before 5.8.26; from 6.3.0 before 6.3.17; from 6.4.0 before 6.4.17; from 6.5.0 before 6.5.10.2; from 7.0.0 before 7.0.5.1
On the Atlas
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CoverageNo articles yet
No CyberSIXT article names CVE-2026-40988 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.