CVE-2026-25480

Published: Feb 9, 2026Modified: Jun 17, 2026

6.5

Vector

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

Exploitability: 3.9 / Impact: 2.5

Source: security-advisories@github.com (Secondary)

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.

Affected (1)

Products: Litestar: Litestar

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Litestar Litestar	Before 2.20.0

Related CWEs

Improper Handling of Unicode Encoding

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

References (4)

https://docs.litestar.dev/2/release-notes/changelog.html#2.20.0

Source: security-advisories@github.com

Release Notes

https://github.com/litestar-org/litestar/commit/85db6183a76f8a6b3fd6ee3c88d860b9f37a2cca

Source: security-advisories@github.com

Patch

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

Source: security-advisories@github.com

Release Notes

https://github.com/litestar-org/litestar/security/advisories/GHSA-vxqx-rh46-q2pg

Source: security-advisories@github.com

ExploitVendor Advisory

Timeline

No history available yet.