# CVE-2026-25480

## Summary

- **CVE ID:** CVE-2026-25480
- **Severity:** MEDIUM
- **CVSS Score:** 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)
- **CWE:** CWE-176
- **Published:** Feb 9, 2026
- **Last Modified:** Mar 12, 2026

## 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 Products

- litestar-org — litestar (< 2.20.0)

## References

- [CNA](https://github.com/litestar-org/litestar/security/advisories/GHSA-vxqx-rh46-q2pg)
- [CNA](https://github.com/litestar-org/litestar/commit/85db6183a76f8a6b3fd6ee3c88d860b9f37a2cca)
- [CNA](https://docs.litestar.dev/2/release-notes/changelog.html#2.20.0)
- [CNA](https://github.com/litestar-org/litestar/releases/tag/v2.20.0)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.43%
- **EPSS Percentile:** 36.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._