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    CVE-2026-25478

    Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to 2.20.0, CORSConfig.allowed_origins_regex is constructed using a regex built from configured allowlist values and used with fullmatch() for validation. Because metacharacters are not escaped, a malicious origin can match unexpectedly. The check relies on allowed_origins_regex.fullmatch(origin). This vulnerability is fixed in 2.20.0.

    Published:Feb 9, 2026
    Last Modified:Apr 18, 2026
    EPS:Feb 9, 2026
    EPSS Score:0.0002
    CVSS Score:7.4

    Affected Products

    Vendor
    Litestar
    Product
    Litestar
    Vendor
    Litestar-org
    Product
    Litestar

    Exploits

    https://github.com/litestar-org/litestar/security/advisories/GHSA-2p2x-hpg8-cqp2

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    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