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CVE-2026-121819 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/line/armeria/security/advisories/GHSA-m64h-m6r5-6jrx	[email protected]	AdvisoryRemedyTechnical AnalysisVendor
https://line.github.io/security-advisory-blog/CVE-2026-121819/	[email protected]	AdvisoryRemedyVendor

Weakness Enumeration

No weakness enumeration is available for this CVE.

Affected Products

Product	Versions
LINE armeria-xds	>= 1.40.0, < 1.43.0 (semver)
CPE No CPEs found in CPE dictionary for this product. Remediation Upgrade: 1.43.0moderate effort Workaround:low effort Revert to the default DataSourcePolicy, which is 'allowAll'. This will eliminate the confinement check and prevent any additional exposure. Workaround:low effort For deployments using a restrictive DataSourcePolicy with allowedRootDirs, ensure that the allow-listed directories do not contain any symbolic links whose targets lie outside those roots.

Product

Versions

LINE armeria-xds

>= 1.40.0, < 1.43.0 (semver)

CPE

No CPEs found in CPE dictionary for this product.

Remediation

Upgrade: 1.43.0moderate effort
Workaround:low effort
Revert to the default DataSourcePolicy, which is 'allowAll'. This will eliminate the confinement check and prevent any additional exposure.
Workaround:low effort
For deployments using a restrictive DataSourcePolicy with allowedRootDirs, ensure that the allow-listed directories do not contain any symbolic links whose targets lie outside those roots.

Change History

1 change record found show changes