What is CVE-2026-82265?

CVE-2026-82265 is a medium-severity vulnerability in Openzipkin Zipkin, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2026-08-28.

How severe is CVE-2026-82265?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Openzipkin Zipkin

CVE-2026-82265

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.

Vulnerability class: Broken Authentication

Published 2026-08-28 · last modified 2026-09-24.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (37.1th percentile), scored 2026-10-13.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

Affected products

Openzipkin Zipkin

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

github.com/openzipkin/zipkin/issues/3835 (issue-tracking)
github.com/openzipkin/zipkin (product)
github.com/openzipkin/zipkin/blob/878ce2a1fad54ca941d17fdcf2e1d924b148eb1f/zipk… (technical-description)
www.vulncheck.com/advisories/zipkin-unauthenticated-spring-boot-actuator-endpoi… (third-party-advisory)

Frequently asked questions

What is CVE-2026-82265?: CVE-2026-82265 is a medium-severity vulnerability in Openzipkin Zipkin, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2026-08-28.
How severe is CVE-2026-82265?: Medium severity. CVSS v3 base score is 6.5 out of 10.