Applications using AesBytesEncryptor with the two-argument constructor or when passing a null IV generator and CBC as the encryption mode encrypt data with AES/CBC using a null (all-zero) initialization vector.
Spring Security 7.1.0
Spring Security 7.0.0 - 7.0.6
Spring Security 6.5.0 - 6.5.11
Spring Security 6.4.0 - 6.4.18
Spring Security 5.8.0 - 5.8.27
Spring Security 5.7.0 - 5.7.25

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Spring Spring Security unaffected
Version Status Constraints
7.1.0 affected —
7.0.0 affected ≤ 7.0.6
6.5.0 affected ≤ 6.5.11
6.4.0 affected ≤ 6.4.18
5.8.0 affected ≤ 5.8.27
5.7.0 affected ≤ 5.7.25

No data.

No data.

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://spring.io/security/cve-2026-47842 cve-icon cve-icon
History

Wed, 26 Aug 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Spring
Spring spring Security
Weaknesses CWE-327
CWE-330
Vendors & Products Spring
Spring spring Security

Wed, 26 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 26 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Description Applications using AesBytesEncryptor with the two-argument constructor or when passing a null IV generator and CBC as the encryption mode encrypt data with AES/CBC using a null (all-zero) initialization vector. Spring Security 7.1.0 Spring Security 7.0.0 - 7.0.6 Spring Security 6.5.0 - 6.5.11 Spring Security 6.4.0 - 6.4.18 Spring Security 5.8.0 - 5.8.27 Spring Security 5.7.0 - 5.7.25
Title Deterministic AES/CBC Encryption in Spring Security AesBytesEncryptor Allows Ciphertext Correlation
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: vmware

Published:

Updated: 2026-08-26T19:45:25.424Z

Reserved: 2026-05-20T10:00:51.004Z

Link: CVE-2026-47842

cve-icon Vulnrichment

Updated: 2026-08-26T19:45:19.360Z

cve-icon NVD

Status : Received

Published: 2026-08-26T20:17:25.753

Modified: 2026-08-26T20:17:25.753

Link: CVE-2026-47842

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-26T20:45:03Z

Weaknesses