CVE-2026-47838 Affecting nacos package, versions <3.2.3-r1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.19% (9th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-NACOS-18007801
  • published18 Jul 2026
  • disclosed10 Jun 2026

Introduced: 10 Jun 2026

CVE-2026-47838  (opens in a new tab)

How to fix?

Upgrade Chainguard nacos to version 3.2.3-r1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nacos package and not the nacos package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

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 Base Scores

version 3.1