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Zipkin CVE-2026-82265

| EUVDEUVD-2026-67796 MEDIUM
Missing Authentication for Critical Function (CWE-306)
2026-08-28 VulnCheck GHSA-2mv6-7845-668g
Java Authentication Bypass Zipkin
6.9
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
6.9 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
6.5 MEDIUM

Network-accessible, no authentication required (PR:N); low confidentiality and integrity impact scoped to Zipkin system directly; no availability impact.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

1
Analysis Generated
Aug 28, 2026 - 21:02 vuln.today

DescriptionCVE.org

Zipkin through 3.6.1 exposes Spring Boot Actuator endpoints on the tracing API port without authentication, allowing unauthenticated attackers to access sensitive information. Attackers can read environment variables, bean configurations, and storage credentials via actuator endpoints, or modify log levels to suppress logging.

AnalysisAI

Unauthenticated access to Spring Boot Actuator management endpoints in Zipkin through 3.6.1 exposes sensitive operational data and configuration controls on the same port as the tracing API. Remote attackers with network reach to the Zipkin API port can read environment variables, bean configurations, and storage backend credentials via endpoints such as /actuator/env and /actuator/beans, or silently suppress security-relevant logging by modifying log levels via /actuator/loggers. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Spring Boot Actuator endpoints must be enabled and accessible on the Zipkin tracing API port - the referenced default configuration in zipkin-server-shared.yml indicates this is the default deployment posture, not a non-default opt-in. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 base score of 6.9 reflects AV:N/AC:L/AT:N/PR:N/UI:N with VC:L/VI:L/VA:N. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation No vendor-released patch version is confirmed in the available data - the upstream GitHub issue (https://github.com/openzipkin/zipkin/issues/3835) should be monitored for a fix release. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-82265 vulnerability details – vuln.today
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