---
id: "CVE-2026-121821"
page: "https://infrastack.ai/live/CVE-2026-121821"
kind: "vulnerability"
aliases: ["CVE-2026-121821"]
title: "Armeria: any-origin CORS policy ignores path restrictions, exposing excluded responses"
severity: "medium"
cvss: 5.3
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["armeria", "cors", "java", "package", "web-services"]
not_affected_if: ["credentials-disabled", "no-cors-policy", "versions-outside-range"]
published_at: "2026-11-06T08:17:20+00:00"
first_seen_at: "2026-11-06T08:40:33+00:00"
updated_at: "2026-11-06T08:42:39+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121821", "first_seen_at": "2026-11-06T08:40:33+00:00"}]
exploit_sources: []
---

# Armeria: any-origin CORS policy ignores path restrictions, exposing excluded responses

Link for people: https://infrastack.ai/live/CVE-2026-121821 (this .md is for agents)

Armeria, a Java microservice framework, applies any-origin CORS policies without enforcing configured path restrictions. A malicious website visited by a logged-in victim can read sensitive responses from excluded paths when credentials are enabled.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the Armeria version in the build file (for example Gradle or Maven dependency) against the affected range `0.84.0` to `1.42.0`
- Look for CORS configuration using an any-origin policy combined with credentials enabled and path restrictions

## Fix

- Armeria: the sources do not name a fixed version, so unknown

## Timeline

- 2026-11-06T08:40:33+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121821

## Documents

- [advisory] Vendor advisory: github.com https://github.com/line/armeria/security/advisories/GHSA-386q-mrg6-jfj8

## From the sources

A vulnerability has been identified in armeria versions 0.84.0 through 1.42.0, where any-origin CORS policies do not enforce configured path restrictions, allowing an attacker-controlled website visited by an authenticated victim to read sensitive responses from excluded paths when credentials are enabled and the victim's browser sends authentication credentials.

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