8.1

CVE-2026-47838: spring spring security Improper Authentication

CVSS: 8.1v3.1HighAnalyzed
AliasesCGA-295p-w9m7-5fmrCGA-2jw2-jf59-56g6CGA-2mgc-9mwg-c84m
Published 09-06-2026Last modified 30-06-2026
Open JSON
Some data may be incomplete
  • 1 reference with an unsupported link type was hidden.

Vulnerability summary

CVE-2026-47838 is a high (CVSS 8.1) Improper Authentication vulnerability in spring spring security. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.4% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.1 (NVD)
EPSS score
0.19%
0%100%
Low · +0.06 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-5H3G-2C27-CWFM

Timeline

  1. 09-06-2026
    PublishedVulnerability first disclosed.
  2. 30-06-2026
    Last modifiedVulnerability information updated.

Description

SubjectDnX509PrincipalExtractor does not correctly handle certain malformed X.509 certificate CN values, which can lead to reading the wrong value for the username. In a carefully crafted certificate, this can lead to an attacker impersonating another user. Affected versions: Spring Security 5.7.0 through 5.7.24; 5.8.0 through 5.8.26; 6.3.0 through 6.3.17; 6.4.0 through 6.4.17; 6.5.0 through 6.5.10.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

+0.06 pp

From 0.13% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.19%

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

Chainguard25 products
  • camunda-zeebe-8.6All versions (No fix recorded)
  • geoserver-2.27All versions (No fix recorded)
  • geoserver-2.28All versions (No fix recorded)
  • jenkins-2.528-openjdk-17All versions (No fix recorded)
  • jenkins-2.528-openjdk-21All versions (No fix recorded)
Org.springframework.security1 product
  • spring-security-web≥ 6.5.0, < 6.5.11 | ≥ 6.4.0, ≤ 6.4.13 | ≥ 6.0.0, ≤ 6.3.10 | ≥ 5.8.0, ≤ 5.8.16 | ≤ 5.7.14
Spring1 product
  • spring security≥ 5.7.0, < 5.7.25 | ≥ 5.8.0, < 5.8.27 | ≥ 6.3.0, < 6.3.18 | ≥ 6.4.0, < 6.4.18 | ≥ 6.5.0, < 6.5.10.2
Vmware1 product
  • spring_security< 5.7.25 | ≥ 5.8.0, < 5.8.27 | ≥ 6.3.0, < 6.3.18 | ≥ 6.4.0, < 6.4.18 | ≥ 6.5.0, < 6.5.11

4 vendors · 28 products

References

4 links