6.5

CVE-2026-25480

Exploit

FileStore key canonicalization collisions allow response cache mixup/poisoning (ASCII ord + Unicode NFKD)

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Litestar ≫ Litestar Version < 2.20.0
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.41% 0.327
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 6.5 3.9 2.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE-176 Improper Handling of Unicode Encoding

The product does not properly handle when an input contains Unicode encoding.

https://docs.litestar.dev/2/release-notes/changelog.html#2.20.0
Release Notes
https://github.com/litestar-org/litestar/releases/tag/v2.20.0
Release Notes
https://github.com/litestar-org/litestar/security/advisories/GHSA-vxqx-rh46-q2pg
Vendor Advisory
Exploit
https://github.com/litestar-org/litestar/commit/85db6183a76f8a6b3fd6ee3c88d860b9f37a2cca
Patch