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.
History

Tue, 10 Feb 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 10 Feb 2026 16:30:00 +0000

Type Values Removed Values Added
First Time appeared Litestar-org
Litestar-org litestar
Vendors & Products Litestar-org
Litestar-org litestar

Mon, 09 Feb 2026 19:30:00 +0000

Type Values Removed Values Added
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.
Title FileStore key canonicalization collisions allow response cache mixup/poisoning (ASCII ord + Unicode NFKD)
Weaknesses CWE-176
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-02-09T18:49:34.305Z

Updated: 2026-02-10T16:01:06.327Z

Reserved: 2026-02-02T16:31:35.821Z

Link: CVE-2026-25480

cve-icon Vulnrichment

Updated: 2026-02-10T15:39:52.916Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-02-09T20:15:57.330

Modified: 2026-02-09T21:55:30.093

Link: CVE-2026-25480

cve-icon Redhat

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