CVE-2026-41694: Spring Framework Decryption Oracle Vulnerability From Unsigned Vulnerability

LOW
Advisory Identifier: GHSA-ww38-37g9-m3q3
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CVSS 3.7
CWE-347
Published
Advisory Summary

CVE-2026-41694 is a LOW (CVSS 3.7) decryption oracle vulnerability from unsigned vulnerability (CWE-347: Improper Verification of Cryptographic Signature) affecting Spring Framework libraries in the Maven ecosystem. The issue involves decryption oracle vulnerability from unsigned saml response and logout payloads. Remediation is available by upgrading affected packages to version 7.0.6, 6.5.11.

CVE-2026-41694 at a Glance

CVE Identifier CVE-2026-41694
GHSA Identifier GHSA-ww38-37g9-m3q3
Severity LOW
CVSS v3.1 Base Score 3.7
CWE Classification CWE-347: Improper Verification of Cryptographic Signature
Affected Product Spring Framework
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 3.7

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-41694

To remediate this vulnerability, upgrade all affected Spring Framework dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.springframework.security:spring-security-saml2-service-provider fixed: 7.0.6 
<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-saml2-service-provider</artifactId>
    <version>7.0.6</version>
</dependency>
org.springframework.security:spring-security-saml2-service-provider fixed: Latest secure release 
<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-saml2-service-provider</artifactId>
    <version>Latest secure release</version>
</dependency>
org.springframework.security:spring-security-saml2-service-provider fixed: 6.5.11 
<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-saml2-service-provider</artifactId>
    <version>6.5.11</version>
</dependency>
org.springframework.security:spring-security-saml2-service-provider fixed: Latest secure release 
<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-saml2-service-provider</artifactId>
    <version>Latest secure release</version>
</dependency>
org.springframework.security:spring-security-saml2-service-provider fixed: Latest secure release 
<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-saml2-service-provider</artifactId>
    <version>Latest secure release</version>
</dependency>
org.springframework.security:spring-security-saml2-service-provider fixed: Latest secure release 
<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-saml2-service-provider</artifactId>
    <version>Latest secure release</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.springframework.security

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-41694, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.springframework.security

Analyze the terminal output to locate any version of Spring Framework in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 7.0.6), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.springframework.security command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-347: Improper Verification of Cryptographic Signature, where the product does not verify, or incorrectly verifies, the cryptographic signature for data. In Spring Framework, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Since Spring Security SAML decrypts SAML Responses as well as elements of SAML LogoutRequests and LogoutResponses without requiring a valid signature, attackers may be able to craft these SAML payloads and use the Service Provider as a decryption oracle. 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.

CVE-2026-41694 Affected Spring Framework Versions

6 component(s)
Fixed Versions:
7.0.66.5.11
Product / Package Ecosystem Affected Versions Fixed Version
org.springframework.security:spring-security-saml2-service-provider
maven/org.springframework.security/spring-security-saml2-service-provider
Maven
≥ 7.0.0
< 7.0.6
7.0.6
org.springframework.security:spring-security-saml2-service-provider
maven/org.springframework.security/spring-security-saml2-service-provider
Maven
≥ 6.4.0
≤ 6.4.16
org.springframework.security:spring-security-saml2-service-provider
maven/org.springframework.security/spring-security-saml2-service-provider
Maven
≥ 6.5.0
< 6.5.11
6.5.11
org.springframework.security:spring-security-saml2-service-provider
maven/org.springframework.security/spring-security-saml2-service-provider
Maven
≥ 6.3.0
≤ 6.3.16
org.springframework.security:spring-security-saml2-service-provider
maven/org.springframework.security/spring-security-saml2-service-provider
Maven
≥ 5.8.0
≤ 5.8.25
org.springframework.security:spring-security-saml2-service-provider
maven/org.springframework.security/spring-security-saml2-service-provider
Maven
≤ 5.7.23

References

NVD — CVE-2026-41694 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-41694
Spring Framework Source Repository REPOSITORY
https://github.com/spring-projects/spring-security
Spring Framework Release RELEASE
https://github.com/spring-projects/spring-security/releases/tag/6.5.11
Spring Framework Release RELEASE
https://github.com/spring-projects/spring-security/releases/tag/7.0.6
Spring Framework Security Information SECURITY
https://spring.io/security/cve-2026-41694

Frequently Asked Questions

What is CVE-2026-41694?
CVE-2026-41694 is a security vulnerability in Spring Framework involving Decryption Oracle Vulnerability from Unsigned SAML Response and Logout Payloads under CWE-347: Improper Verification of Cryptographic Signature.
Which Spring Framework versions are affected?
Affected versions include releases prior to 7.0.6, 6.5.11 across affected packages: org.springframework.security:spring-security-saml2-service-provider.
What version fixes CVE-2026-41694?
Upgrading to 7.0.6, 6.5.11 (or the latest patched release for your respective branch) resolves the vulnerability.
Is spring-security-saml2-service-provider affected?
Yes, org.springframework.security:spring-security-saml2-service-provider is affected in releases prior to 7.0.6, Latest secure release, 6.5.11. Upgrade your dependency to 7.0.6, Latest secure release, 6.5.11 or later.
What is the CVSS score of CVE-2026-41694?
CVE-2026-41694 has a CVSS v3.1 base score of 3.7 (LOW) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2026-41694?
CVE-2026-41694 is classified under CWE-347: Improper Verification of Cryptographic Signature (The product does not verify, or incorrectly verifies, the cryptographic signature for data.).
How can I check Maven dependencies for CVE-2026-41694?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.springframework.security'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-ww38-37g9-m3q3",
  "modified" : "2026-08-12T16:22:24Z",
  "published" : "2026-06-10T00:31:51Z",
  "aliases" : [ "CVE-2026-41694" ],
  "summary" : "Spring Security SAML2 Service Provider: Decryption Oracle Vulnerability from Unsigned SAML Response and Logout Payloads",
  "details" : "Since Spring Security SAML decrypts SAML Responses as well as elements of SAML LogoutRequests and LogoutResponses without requiring a valid signature, attackers may be able to craft these SAML payloads and use the Service Provider as a decryption oracle.\n\nAffected versions:\nSpring 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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.springframework.security:spring-security-saml2-service-provider"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.0.0"
      }, {
        "fixed" : "7.0.6"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 7.0.5"
    }
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.springframework.security:spring-security-saml2-service-provider"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.5.0"
      }, {
        "fixed" : "6.5.11"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 6.5.10"
    }
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.springframework.security:spring-security-saml2-service-provider"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.4.0"
      }, {
        "last_affected" : "6.4.16"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.springframework.security:spring-security-saml2-service-provider"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.3.0"
      }, {
        "last_affected" : "6.3.16"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.springframework.security:spring-security-saml2-service-provider"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "5.8.0"
      }, {
        "last_affected" : "5.8.25"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.springframework.security:spring-security-saml2-service-provider"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "5.7.23"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-41694"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/spring-projects/spring-security"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/spring-projects/spring-security/releases/tag/6.5.11"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/spring-projects/spring-security/releases/tag/7.0.6"
  }, {
    "type" : "WEB",
    "url" : "https://spring.io/security/cve-2026-41694"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-347" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-12T16:22:24Z",
    "nvd_published_at" : "2026-06-10T00:16:50Z"
  }
}