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CVE-2026-55814 – Authentication Bypass (Missing Authentication) – Apache Ranger <= 2.8.0

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Summary

CVE-2026-55814 is a missing authentication vulnerability (CWE-306) in the download APIs of Apache Ranger. In affected deployments these endpoints expose plugin policy data without requiring authentication, allowing an unauthenticated network attacker to retrieve sensitive information. The issue affects Apache Ranger versions up to and including 2.8.0 and is rated High (CVSS 7.5).

Technical details

  • Root cause: The Apache Ranger download APIs do not enforce authentication, exposing plugin data to unauthenticated callers (CWE-306, Missing Authentication for Critical Function).
  • Trigger conditions: Affects users running Apache Ranger in a non-Kerberos environment, where the download endpoints can be reached without authentication.
  • Attack vector: Network (AV:N), low complexity, no privileges and no user interaction required.
  • Impact: Disclosure of plugin data served by the download APIs; high confidentiality impact, no impact to integrity or availability.

Affected software

  • Apache Ranger versions 0 through 2.8.0 (all releases up to and including 2.8.0).

Severity

  • CVSS v3.1 base score: 7.5 (High)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Mitigation and recommended actions

  • Immediate: Upgrade to Apache Ranger 2.9.0 or later, which requires authentication for the download APIs.
  • If no patch: Restrict network access to the Ranger admin service and its download endpoints so they are not reachable by untrusted networks; where feasible, operate Ranger in a Kerberos-enabled environment.

How IONIX identifies potentially affected assets

IONIX matches the following signals against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.

  • Named response header (set-cookie): RANGERADMINSESSIONID=
  • Page title: Ranger - Sign In
  • Raw response body: scripts/prelogin/XAPrelogin.js, images/ranger_logo.png

References

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1

Map your entire attack surface (continously)

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3

Identify Potential External Exposures

Not all CVEs matter. IONIX filters vulnerabilities by asking attacker-centric questions: Can it be reached from the internet? Does it require authentication? Is it being exploited in the wild? This dramatically reduces noise and focuses teams on threats that can actually be weaponized.

4

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