CVE-2026-59276— Timing Attack via Non-Constant-Time Comparison of Sensitive Values
Quick assessment
Affected
Spring Spring Security
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
以下是该漏洞描述的中文翻译： Spring Security 的多个组件在比较安全敏感值时，使用的是标准字符串相等性检查（ ），而非恒定时间比较（constant-time comparison）。由于 在发现第一个不匹配的字符时就会立即返回，因此拒绝一个错误值所花费的时间与匹配的前缀字符数量成正比。 受影响版本： Spring Security 7.1.0 Spring Security 7.0.0 至 7.0.6 Spring Security 6.5.0 至 6.5.11 Spring Security 6.
Possible ATT&CK Techniques 1 AI
T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-59276
Vulnerability Information
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Vulnerability Title
Timing Attack via Non-Constant-Time Comparison of Sensitive Values
Source: CVE Program / CVE List V5
Vulnerability 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.
Spring Security 7.1.0
Spring Security 7.0.0 - 7.0.6
Spring Security 6.5.0 - 6.5.11
Spring Security 6.4.0 - 6.4.18
Spring Security 5.8.0 - 5.8.27
Spring Security 5.7.0 - 5.7.25
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Spring | Spring Security | 7.1.0 | - |
|
II. Public POCs for CVE-2026-59276
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Pages for CVE-2026-59276 (1)
Same Patch Batch · Spring · 2026-08-27 · 64 CVEs total
| CVE-2026-59270 | 9.4 CRITICAL | Spring Security embedded UnboundID LDAP server exposes well-known administrative bind DN o |
| CVE-2026-47877 | 8.2 HIGH | Spring Security Authorization Server Default Consent Page is vulnerable to Cross-Site Scri |
| CVE-2026-59324 | 8.2 HIGH | fluxTransform shared RequestMessageHolder causes cross-message header leakage under async |
| CVE-2026-59316 | 8.2 HIGH | Spring Authorization Server Default Consent Page is vulnerable to Cross-Site Scripting (XS |
| CVE-2026-59307 | 8.0 HIGH | Deserialization allow-list silently bypassed: setBeanClassLoader replaces deserializer but |
| CVE-2026-47879 | 7.7 HIGH | Spring Cloud Gateway SSRF and native file access with gRPC |
| CVE-2026-47849 | 7.1 HIGH | Spring Data REST allows mutation of identifier and version properties via JSON Patch |
| CVE-2026-59311 | 6.8 MEDIUM | Fixed predictable /tmp/ziptransformer work directory enables symlink pre-creation |
| CVE-2026-59272 | 6.8 MEDIUM | Log4j2 AmqpAppender disables TLS hostname verification by default |
| CVE-2026-59284 | 6.6 MEDIUM | Spring Cloud Commons no allow list for writable env actuator endpoint |
| CVE-2026-59293 | 6.6 MEDIUM | SMB minimum protocol dialect defaults to SMB1 |
| CVE-2026-59275 | 6.6 MEDIUM | Remote JVM termination: nested-array Java deserialization bypasses allowlist, triggers Sta |
| CVE-2026-59317 | 6.5 MEDIUM | In Spring for Apache Kafka, missing header validation in DeadLetterPublishingRecovererFact |
| CVE-2026-59274 | 6.5 MEDIUM | Unbounded decompression in UnZipTransformer enables zip-bomb DoS |
| CVE-2026-59278 | 6.5 MEDIUM | In Spring for Apache Kafka, SSRF via DNS resolution triggered by untrusted java.net types |
| CVE-2026-59320 | 6.5 MEDIUM | In Spring AMQP the link credit never replenished on listener exception path |
| CVE-2026-47864 | 6.4 MEDIUM | Unsafe Java deserialization in SerializingHttpMessageConverter — remote code execution |
| CVE-2026-59322 | 6.3 MEDIUM | EmbeddedHeadersJsonMessageMapper default gives wire peer full control of MessageHeaders |
| CVE-2026-47881 | 5.9 MEDIUM | Denial of Service in Spring Batch FlatFileItemReader via Malformed Input File |
| CVE-2026-59294 | 5.9 MEDIUM | Arbitrary File Write via Path Traversal in ResourceCacheService |
Showing top 20 of 64 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Spring Security
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Spring Security embedded UnboundID LDAP server exposes well- -
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Spring Security Authorization Server Default Consent Page is -
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Deterministic AES/CBC Encryption in Spring Security AesBytes -
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WebAuthn User Verification Bypass via Session Serialization
Same vendor: Spring
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fluxTransform shared RequestMessageHolder causes cross-messa -
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EmbeddedHeadersJsonMessageMapper default gives wire peer ful -
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Shared JSR-223 ScriptEngine evaluated concurrently without T -
CVE-2026-59320
In Spring AMQP the link credit never replenished on listener -
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