CVE-2026-121821

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    CVE-2026-121821

    Published: 6 Nov 2026Last Modified: 8 Nov 2026

    Summary:

    Details: 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.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121821.json, https://github.com/line/armeria/security/advisories/GHSA-386q-mrg6-jfj8, https://line.github.io/security-advisory-blog/CVE-2026-121821/, https://nvd.nist.gov/vuln/detail/CVE-2026-121821

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 20afcb04089ef4fad22eb717954f456d5928ced3
    Fixed -137a79a287e1a34691d55e2135053ed6ec6f527a

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-121821 | CVE-DB