CVE-2026-41694Network attack vector

Indirect disclosure via unsigned SAML payload decryption

Published Jun 9, 2026 · Updated Jun 9, 2026

Improper signature verification in affected Spring Security releases allows remote attackers to obtain indirect disclosure via SAML payloads. The SAML service-provider path decrypts SAML Responses and encrypted elements in LogoutRequests and LogoutResponses without first requiring a valid signature. The service provider must expose SAML processing and hold decryption keys; crafted unsigned payloads then turn it into an oracle that leaks information about protected plaintext.

CVSS severity3.7
Low
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper signature verification in affected Spring Security releases allows remote attackers to obtain indirect disclosure via SAML payloads. The SAML service-provider path decrypts SAML Responses and encrypted elements in LogoutRequests and LogoutResponses without first requiring a valid signature. The service provider must expose SAML processing and hold decryption keys; crafted unsigned payloads then turn it into an oracle that leaks information about protected plaintext.

The record

CVE
CVE-2026-41694
Published
Jun 9, 2026
Updated
Jun 9, 2026
Vendor
Spring
Product
Spring Security
Classifications
CWE-347
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.7.0 <5.7.24
  2. Affected versionversion=5.8.0 <5.8.26
  3. Affected versionversion=6.3.0 <6.3.17
  4. Affected versionversion=6.4.0 <6.4.17
  5. Affected versionversion=6.5.0 <6.5.11
  6. Affected versionversion=7.0.0 <7.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Spring · Spring Securityversion=5.7.0 <5.7.24; version=5.8.0 <5.8.26; version=6.3.0 <6.3.17; version=6.4.0 <6.4.17; version=6.5.0 <6.5.11; version=7.0.0 <7.0.6

Published CVSS scores

3.7VMwareCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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