---
id: CVE-2026-121821
title: >-
  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…
summary: >-
  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…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-942
vendor: LY Corporation
product: Armeria
affected:
  - Armeria >= 0.84.0 < 1.43.0
published: '2026-11-06'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T07:46:50.787Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121821'
references:
  - url: 'https://line.github.io/security-advisory-blog/CVE-2026-121821/'
  - url: 'https://github.com/line/armeria/security/advisories/GHSA-386q-mrg6-jfj8'
tags:
  - cve.org
ingestedAt: '2026-11-06T08:48:01.716Z'
epss: 0.00324
epssPercentile: 0.25649
---

## Overview

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.

## Affected

- `Armeria >= 0.84.0 < 1.43.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.