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CVE-2026-59323— Micrometer Tracing Brave Bridge W3C Baggage propagation DoS vulnerability

Quick assessment

Affected
Spring Micrometer Tracing
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.

VMware Spring是美国VMware公司的一款开发框架产品。 VMware Spring 1.4.13及之前版本、1.5.0版本至1.5.12版本、1.6.0版本至1.6.6版本和1.7.0版本存在安全漏洞，该漏洞源于解析W3C baggage头时未限制条目数量和大小，导致无界对象分配，攻击者可通过发送包含大量键值对的膨胀baggage头造成拒绝服务。

CVSS 5.3 · Medium EPSS 0.40% · P32

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 4

VendorProduct Version RangeStatus
Spring Micrometer Tracing 1.7.0 affected
1.6.0≤ 1.6.6 affected
1.5.0≤ 1.5.12 affected
≤ 1.4.13 affected
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I. Basic Information for CVE-2026-59323

Vulnerability Information
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Vulnerability Title
Micrometer Tracing Brave Bridge W3C Baggage propagation DoS vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
An application using Micrometer Tracing with W3C baggage propagation in the Brave bridge is vulnerable to denial of service (DoS) due to unbounded object allocation when extracting incoming baggage headers. Micrometer Tracing 1.7.0 Micrometer Tracing 1.6.0 - 1.6.6 Micrometer Tracing 1.5.0 - 1.5.12 Micrometer Tracing 1.4.13 and earlier
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
VMware Spring 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
VMware Spring是美国VMware公司的一款开发框架产品。 VMware Spring 1.4.13及之前版本、1.5.0版本至1.5.12版本、1.6.0版本至1.6.6版本和1.7.0版本存在安全漏洞，该漏洞源于解析W3C baggage头时未限制条目数量和大小，导致无界对象分配，攻击者可通过发送包含大量键值对的膨胀baggage头造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Spring Micrometer Tracing 1.7.0 -

II. Public POCs for CVE-2026-59323

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III. Intelligence Information for CVE-2026-59323

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Vendor Advisories for CVE-2026-59323 (1)

Same Patch Batch · Spring · 2026-08-21 · 5 CVEs total

CVE-2026-59279 7.5 HIGH Unbounded persistent session allocation via repeated initialize requests
CVE-2026-59318 6.5 MEDIUM DefaultToolCallingManager Global Resolver Fallback Allows Unadvertised Tool Dispatch via P
CVE-2026-59296 5.9 MEDIUM Micrometer StatsD and Logging meter registries line-protocol and log injection vulnerabili
CVE-2026-59308 4.2 MEDIUM Semantic Cache Cross-Tenant Isolation Bypass via SHA-256 Truncation

IV. Related Vulnerabilities

Same vendor: Spring

V. Comments for CVE-2026-59323

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