Medium [CVE-2026-47838] Spring Security: SubjectDnX509PrincipalExtractor does not correctly handle certain malformed X.509 certificate CN values, which can le…
This medium-severity VMware (Broadcom) advisory covers CVE-2026-47838 affecting Spring Security.
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Summary
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 product named by the advisory: Spring Security.
- 5.7.0
- 5.7.24
- 5.8.0
- 5.8.26
- 6.3.0
- 6.3.17
- 6.4.0
- 6.4.17
- 6.5.0
- 6.5.10
NVD record · high-confidence parse· fetched 2 months ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
NVD record · high-confidence parse· fetched 2 months ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
NVD record · high-confidence parse· fetched 2 months ago·verify at source
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