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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00029.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
litestar-org litestar affected
Version Status Constraints
< 2.20.0 affected —

No data.

No data.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-vxqx-rh46-q2pg Litestar's FileStore key canonicalization collisions allow response cache mixup/poisoning (ASCII ord + Unicode NFKD)
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://docs.litestar.dev/2/release-notes/changelog.html#2.20.0 cve-icon cve-icon
https://github.com/litestar-org/litestar/commit/85db6183a76f8a6b3fd6ee3c88d860b9f37a2cca cve-icon cve-icon
https://github.com/litestar-org/litestar/releases/tag/v2.20.0 cve-icon cve-icon
https://github.com/litestar-org/litestar/security/advisories/GHSA-vxqx-rh46-q2pg cve-icon cve-icon
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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

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

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-10T16:26:52Z

Weaknesses