CVE-2025-59152highCWE-807

CVE-2025-59152: high-severity vulnerability in litestar-org litestar

X-Forwarded-For Header Spoofing Bypasses Litestar Rate Limiting

Published

Follow this CVE+ Monitor litestar+ Monitor litestar

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.5epss 0.5%
Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. In version 2.17.0, rate limits can be completely bypassed by manipulating the X-Forwarded-For header. This renders IP-based rate limiting ineffective against determined attackers. Litestar's RateLimitMiddleware uses `cache_key_from_request()` to generate cache keys for rate limiting. When an X-Forwarded-For header is present, the middleware trusts it unconditionally and uses its value as part of the client identifier. Since clients can set arbitrary X-Forwarded-For values, each different spoofed IP creates a separate rate limit bucket. An attacker can rotate through different header values to avoid hitting any single bucket's limit. This affects any Litestar application using RateLimitMiddleware with default settings, which likely includes most applications that implement rate limiting. Version 2.18.0 contains a patch for the vulnerability.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
litestar-org · litestar
Related CVEs — litestar-org litestar

In the same product, most dangerous first.

CVE-2024-52581HIGHLitestar allows unbounded resource consumption (DoS vulnerability)EPSS 0.8%CVE-2024-32982HIGHLitestar and Starlite affected by Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')EPSS 0.7%CVE-2024-42370HIGHLitestar repository vulnerable to Environment Variable injection in `docs-preview.yml` workflowEPSS 0.7%CVE-2026-25480MEDIUMFileStore key canonicalization collisions allow response cache mixup/poisoning (ASCII ord + Unicode NFKD)EPSS 0.5%CVE-2026-25478HIGHLitestar has a CORS origin allowlist bypass due to unescaped regex metacharacters in allowed originsEPSS 0.4%CVE-2026-48061MEDIUMLitestar: AllowedHostsMiddleware bypasses host validation via client-controlled X-Forwarded-Host headerEPSS 0.4%