Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-59276

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
27/08/2026
Last modified:
27/08/2026

Description

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.<br /> Spring Security 7.1.0<br /> Spring Security 7.0.0 - 7.0.6<br /> Spring Security 6.5.0 - 6.5.11<br /> Spring Security 6.4.0 - 6.4.18<br /> Spring Security 5.8.0 - 5.8.27<br /> Spring Security 5.7.0 - 5.7.25

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 5.90 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): None

Base Score 3.x
5.90
Severity 3.x
MEDIUM

References to Advisories, Solutions, and Tools