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    CVE-2026-25480

    Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to 2.20.0, FileStore maps cache keys to filenames using Unicode NFKD normalization and ord() substitution without separators, creating key collisions. When FileStore is used as response-cache backend, an unauthenticated remote attacker can trigger cache key collisions via crafted paths, causing one URL to serve cached responses of another (cache poisoning/mixup). This vulnerability is fixed in 2.20.0.

    Published:Feb 9, 2026
    Last Modified:Apr 18, 2026
    EPS:Feb 9, 2026
    EPSS Score:0.00021
    CVSS Score:6.5

    Affected Products

    Vendor
    Litestar
    Product
    Litestar
    Vendor
    Litestar-org
    Product
    Litestar

    Exploits

    https://github.com/litestar-org/litestar/security/advisories/GHSA-vxqx-rh46-q2pg

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-71 Using Unicode Encoding to Bypass Validation Logic

    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