CVE-2026-31377: Apache Doris: Improper Authentication Allows Unauthorized Access to FE Meta Service

[Calvin Kirs <kirs () apache org>]

Severity: important 
    CVSS 3.1: 7.5 (high) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected versions:

- Apache Doris 2.0.0 before 4.0.8
- Apache Doris 4.1.0 before 4.1.4
- Apache Doris before 2.0.0 unaffected
- Apache Doris 4.0.8 before 4.1.0 unaffected
- Apache Doris 4.1.4 or later unaffected

Description:

An Improper Authentication vulnerability in the Apache Doris Frontend (FE) meta service allows an unauthenticated 
remote attacker to access internal metadata service endpoints.



The affected endpoints relied on client-supplied node information for authentication without providing sufficient 
authentication of the requesting party. Under certain network configurations, a remote attacker may be able to bypass 
the intended access control and access internal FE metadata interfaces, potentially exposing sensitive cluster 
information.



This issue affects Apache Doris: from 2.0.0 through 2.0.*, from 2.1.0 through 2.1.*, from 3.0.0 through 3.0.*, from 
3.1.0 through 3.1.*, from 4.0.0 before 4.0.8, and from 4.1.0 before 4.1.4. Versions 1.2.x and earlier are not affected 
by this header-trust vulnerability.




Users are recommended to upgrade to a fixed release (4.0.8 or 4.1.4), which fixes the issue.

Credit:

Mapta / BugBunny_ai (reporter)
Calvin Kirs, Security Researcher at SelectDB (reporter)
Vlary (Huntree Security Team) (reporter)
Vladimir Tokarev (g1nd1l4) (reporter)
lalalala5678 (reporter)
4ra2n (A code security AI agent) (reporter)
Fakile Emmanuel (reporter)
Fried Chicken (reporter)

References:

https://doris.apache.org
https://www.cve.org/CVERecord?id=CVE-2026-31377