CVE-2025-22234 Spring Security - BCrypt Password Encoder maximum password length breaks timing attack mitigation
Attackers can infer valid usernames via timing differences due to a broken mitigation in Spring Security's BCrypt encoder under specific configurations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-22234?
CVE-2025-22234 is a medium-severity vulnerability in Spring Security, published on 22 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The fix applied in CVE-2025-22228 inadvertently broke the timing attack mitigation implemented in DaoAuthenticationProvider. This can allow attackers to infer valid usernames or other authentication behavior via response-time differences under certain configurations.
Weakness: CWE-208
Which versions are affected by CVE-2025-22234?
4 open source packages ship an affected version, including org.springframework.security:spring-security-core.
| Package | Affected | Fixed in |
|---|---|---|
org.springframework.security:spring-security-core Maven | From 6.3.8 | 6.3.9 |
org.springframework.security:spring-security-core Maven | From 6.3.8 | 6.3.9 |
org.springframework.security:spring-security-core Maven | From 6.4.4 | 6.4.5 |
org.springframework.security:spring-security-core Maven | From 6.4.4 | 6.4.5 |
How do I fix CVE-2025-22234?
Upgrade org.springframework.security:spring-security-core to a fixed version for your release line: 6.3.9 or 6.4.5.
Is CVE-2025-22234 being exploited?
There is no known exploitation of CVE-2025-22234 in the wild and no public exploit code.
Sources
Also known as CLSA-2025-1754525015, GHSA-vqxh-445g-37fc, MINI-5h5q-p2m5-f2gc, MINI-7mf5-6q3c-8rh6, MINI-8794-24gr-ffq5.