CVE-2026-25480 | THREATINT

Description

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 Reserved 2026-02-02 | Published 2026-02-09 | Updated 2026-02-10 | Assigner GitHub_M

MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Problem types

CWE-176: Improper Handling of Unicode Encoding

Product status

< 2.20.0

affected

References

github.com/...testar/security/advisories/GHSA-vxqx-rh46-q2pg

github.com/...ommit/85db6183a76f8a6b3fd6ee3c88d860b9f37a2cca

docs.litestar.dev/2/release-notes/changelog.html

github.com/litestar-org/litestar/releases/tag/v2.20.0

cve.org (CVE-2026-25480)

nvd.nist.gov (CVE-2026-25480)

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