A vulnerability has been identified in armeria-xds versions 1.40.0 through 1.42.0, where DataSourcePolicy checks filename containment without resolving symbolic links, allowing a compromised or semi-trusted xDS control plane to cause the xDS client to read files outside configured allowed root directories when a symbolic link inside an allowed directory points outside it. In deployments using a credential injector, header-compatible text secrets may be exposed to an attacker-observable upstream.

Attack Vector Network

Attack Complexity Low

Privileges Required High

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
LY Corporation Armeria unaffected
Version Status Constraints
1.40 affected < 1.43.0

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/line/armeria/security/advisories/GHSA-m64h-m6r5-6jrx cve-icon cve-icon
https://line.github.io/security-advisory-blog/CVE-2026-121819/ cve-icon cve-icon
History

Fri, 06 Nov 2026 09:45:00 +0000

Type Values Removed Values Added
Title Armeria xDS Symbolic Link Directory Traversal Leading to File Disclosure
Weaknesses CWE-22

Fri, 06 Nov 2026 08:00:00 +0000

Type Values Removed Values Added
Description A vulnerability has been identified in armeria-xds versions 1.40.0 through 1.42.0, where DataSourcePolicy checks filename containment without resolving symbolic links, allowing a compromised or semi-trusted xDS control plane to cause the xDS client to read files outside configured allowed root directories when a symbolic link inside an allowed directory points outside it. In deployments using a credential injector, header-compatible text secrets may be exposed to an attacker-observable upstream.
References
Metrics cvssV4_0

{'score': 5.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: LY-Corporation

Published:

Updated: 2026-11-06T07:46:45.370Z

Reserved: 2026-11-04T05:50:04.721Z

Link: CVE-2026-121819

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-06T08:17:20.237

Modified: 2026-11-06T08:17:20.237

Link: CVE-2026-121819

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-06T09:30:08Z

Weaknesses