CVE-2026-121820

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    CVE-2026-121820

    Published: 6 Nov 2026Last Modified: 8 Nov 2026

    Summary:

    Details: 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.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121820.json, https://github.com/line/armeria/security/advisories/GHSA-6hgp-j5h7-33m3, https://line.github.io/security-advisory-blog/CVE-2026-121820/, https://nvd.nist.gov/vuln/detail/CVE-2026-121820

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -137a79a287e1a34691d55e2135053ed6ec6f527a

    Affected versions

    armeria-0.27.0.Final

    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-2026-121820 | CVE-DB