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CVE-2026-121820 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-saml versions prior to 1.43.0, where the HTTP-Redirect binding decoder decompresses attacker-supplied SAML messages without limiting the output size before signature validation, allowing an unauthenticated remote attacker to exhaust server memory and cause a denial of service.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/line/armeria/security/advisories/GHSA-6hgp-j5h7-33m3	[email protected]	AdvisoryRemedyTechnical DescriptionVendor
https://line.github.io/security-advisory-blog/CVE-2026-121820/	[email protected]	AdvisoryRemedy

Weakness Enumeration

No weakness enumeration is available for this CVE.

Affected Products

Product	Versions
LINE armeria-saml	< 1.43.0 (semver)
CPE No CPEs found in CPE dictionary for this product. Remediation Upgrade: 1.43.0moderate effort Workaround:low effort Disable the HTTP-Redirect binding and use HTTP-POST binding instead, as the POST decoder is not affected by this vulnerability. Mitigation:low effort Lower the maxRequestLength on the SAML endpoints and/or front them with a proxy/WAF that caps request body size.

Change History

1 change record found show changes