What is the CVSS score of CVE-2026-25480?

CVE-2026-25480 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Litestar are affected by CVE-2026-25480?

Organizations using Litestar should be aware of notable risk from CVE-2026-25480 rated CVSS 6.5. Exploitation could compromise the security of affected deployments.. A patch is available.

Is there a public PoC exploit available for CVE-2026-25480?

Yes, a public proof-of-concept exploit is available for CVE-2026-25480. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-25480?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.

Litestar CVE-2026-25480

MEDIUM

Improper Handling of Unicode Encoding (CWE-176)

2026-02-09 security-advisories@github.com

GHSA-vxqx-rh46-q2pg

Information Disclosure Litestar

6.5

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

6.5 MEDIUM

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

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 17, 2026 - 15:12 vuln.today

Public exploit code

Patch released

Feb 17, 2026 - 15:12 nvd

Patch available

CVE Published

Feb 09, 2026 - 20:15 nvd

MEDIUM 6.5

DescriptionGitHub Advisory

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.

AnalysisAI

Cache poisoning in Litestar before 2.20.0 allows unauthenticated remote attackers to exploit improper Unicode normalization in the FileStore cache backend to create collisions between cache keys, enabling one URL to serve another URL's cached responses. Public exploit code exists for this vulnerability. An attacker can leverage this to serve malicious cached content to users accessing legitimate endpoints.

Technical ContextAI

Classified as CWE-176 (Improper Handling of Unicode Encoding). Affects Litestar. 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.