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.
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History
Tue, 10 Feb 2026 17:15:00 +0000
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ssvc
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Tue, 10 Feb 2026 16:30:00 +0000
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Litestar-org
Litestar-org litestar |
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Litestar-org
Litestar-org litestar |
Mon, 09 Feb 2026 19:30:00 +0000
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| 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 | |
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cvssV3_1
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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
Updated: 2026-02-10T15:39:52.916Z
Status : Awaiting Analysis
Published: 2026-02-09T20:15:57.330
Modified: 2026-02-09T21:55:30.093
Link: CVE-2026-25480
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