CVE-2026-25478— Litestar has a CORS origin allowlist bypass due to unescaped regex metacharacters in allowed origins
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I. Basic Information for CVE-2026-25478
Vulnerability Information
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Vulnerability Title
Litestar has a CORS origin allowlist bypass due to unescaped regex metacharacters in allowed origins
Source: NVD (National Vulnerability Database)
Vulnerability Description
Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to 2.20.0, CORSConfig.allowed_origins_regex is constructed using a regex built from configured allowlist values and used with fullmatch() for validation. Because metacharacters are not escaped, a malicious origin can match unexpectedly. The check relies on allowed_origins_regex.fullmatch(origin). This vulnerability is fixed in 2.20.0.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
过度许可的跨域白名单
Source: NVD (National Vulnerability Database)
Vulnerability Title
Litestar 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Litestar是Litestar开源的一个强大、灵活但固执己见的 ASGI 框架。 Litestar 2.20.0之前版本存在安全漏洞，该漏洞源于正则表达式元字符未转义，可能导致恶意源意外匹配。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| litestar-org | litestar | < 2.20.0 | - |
II. Public POCs for CVE-2026-25478
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://docs.litestar.dev/2/release-notes/changelog.html#2.20.0x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-25478
Same Patch Batch · litestar-org · 2026-02-09 · 3 CVEs total
| CVE-2026-25480 | 6.5 MEDIUM | FileStore key canonicalization collisions allow response cache mixup/poisoning (ASCII ord |
| CVE-2026-25479 | 6.5 MEDIUM | Litestar has an AllowedHosts validation bypass due to unescaped regex metacharacters in co |
IV. Related Vulnerabilities
Same product: litestar
- CVE-2026-25480
FileStore key canonicalization collisions allow response cac - CVE-2026-25479
Litestar has an AllowedHosts validation bypass due to unesca - CVE-2025-59152
X-Forwarded-For Header Spoofing Bypasses Litestar Rate Limit - CVE-2024-52581
Litestar allows unbounded resource consumption (DoS vulnerab - CVE-2024-42370
Litestar repository vulnerable to Environment Variable injec
Same vendor: litestar-org
- CVE-2026-25480
FileStore key canonicalization collisions allow response cac - CVE-2026-25479
Litestar has an AllowedHosts validation bypass due to unesca - CVE-2025-59152
X-Forwarded-For Header Spoofing Bypasses Litestar Rate Limit - CVE-2024-52581
Litestar allows unbounded resource consumption (DoS vulnerab - CVE-2024-42370
Litestar repository vulnerable to Environment Variable injec
Same weakness: CWE-942
- CVE-2026-7643
ChatGPTNextWeb NextChat API Endpoint Next.js cross-domain po - CVE-2026-7581
alexta69 MeTube CORS Policy main.py on_prepare cross-domain - CVE-2026-41056
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ericc-ch copilot-api Token Endpoint server.ts cors cross-dom - CVE-2026-6143
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