CVE-2026-47842CWE-326

CVE-2026-47842

Medium · published August 27, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
3.8
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00150 · 3.8th percentile
Weakness
CWE-326 · Inadequate Encryption Strength
Published
2026-08-27T00:17Z
Affected products (6)
ProductVersionsFixed in
vmware/spring_security≥ 5.7.0, < 5.7.265.7.26
vmware/spring_security≥ 5.8.0, < 5.8.285.8.28
vmware/spring_security≥ 6.4.0, < 6.4.196.4.19
vmware/spring_security≥ 6.5.0, < 6.5.126.5.12
vmware/spring_security≥ 7.0.0, < 7.0.6.17.0.6.1
vmware/spring_security≥ 7.1.0, < 7.1.0.17.1.0.1
References (1)
EPSS history
Timeline
  • 28 AUG 06:43Z
    EPSS moved — → 0%
    epss
  • 26 AUG 19:22Z
    Deterministic AES/CBC Encryption in Spring Security AesBytesEncryptor Allows Ciphertext Correlation
    cvelistv5