6.5

CVE-2026-47842: spring spring security Inadequate Encryption Strength

CVSS: 6.5v3.1MediumAnalyzed
Published 26-08-2026Last modified 26-08-2026
Open JSON

Vulnerability summary

CVE-2026-47842 is a medium (CVSS 6.5) Inadequate Encryption Strength vulnerability in spring spring security. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 3.7% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.15%
0%100%
Low · +0.05 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 26-08-2026
    PublishedVulnerability first disclosed.
  2. 26-08-2026
    Last modifiedVulnerability information updated.

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

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

+0.05 pp

From 0.10% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.15%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Spring1 product
  • spring security7.1.0 | ≥ 7.0.0, ≤ 7.0.6 | ≥ 6.5.0, ≤ 6.5.11 | ≥ 6.4.0, ≤ 6.4.18 | ≥ 5.8.0, ≤ 5.8.27 | ≥ 5.7.0, ≤ 5.7.25
Vmware1 product
  • spring_security≥ 5.7.0, < 5.7.26 | ≥ 5.8.0, < 5.8.28 | ≥ 6.4.0, < 6.4.19 | ≥ 6.5.0, < 6.5.12 | ≥ 7.0.0, < 7.0.6.1 | ≥ 7.1.0, < 7.1.0.1

2 vendors · 2 products

References

1 links