Medium [CVE-2026-59276] Timing Attack via Non-Constant-Time Comparison of Sensitive Values
This medium-severity VMware (Broadcom) advisory covers CVE-2026-59276 affecting Spring Security.
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Summary
Several components in Spring Security compare security-sensitive values using standard string equality (String.equals()) rather than a constant-time comparison.
Because String.equals() returns as soon as it finds a differing character, the time taken to reject an incorrect value is proportional to the number of leading characters that match the expected value.
- Spring Security 7.1.0
- Spring Security 7.0.0 through 7.0.6
- Spring Security 6.5.0 through 6.5.11
- Spring Security 6.4.0 through 6.4.18
- Spring Security 5.8.0 through 5.8.27
- Spring Security 5.7.0 through 5.7.25
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 1 hour 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.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
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