High severity7.5NVD Advisory· Published Feb 12, 2025· Updated Jun 17, 2026
CVE-2025-25200
CVE-2025-25200
Description
Koa is expressive middleware for Node.js using ES2017 async functions. Prior to versions 0.21.2, 1.7.1, 2.15.4, and 3.0.0-alpha.3, Koa uses an evil regex to parse the X-Forwarded-Proto and X-Forwarded-Host HTTP headers. This can be exploited to carry out a Denial-of-Service attack. Versions 0.21.2, 1.7.1, 2.15.4, and 3.0.0-alpha.3 fix the issue.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
koanpm | >= 2.0.0, < 2.15.4 | 2.15.4 |
koanpm | >= 3.0.0-alpha.0, < 3.0.0-alpha.3 | 3.0.0-alpha.3 |
koanpm | >= 1.0.0, < 1.7.1 | 1.7.1 |
koanpm | < 0.21.2 | 0.21.2 |
Affected products
6Patches
Vulnerability mechanics
References
9- github.com/koajs/koa/commit/5054af6e31ffd451a4151a1fe144cef6e5d0d83cnvdPatchWEB
- github.com/koajs/koa/commit/5f294bb1c7c8d9c61904378d250439a321bffd32nvdPatchWEB
- github.com/koajs/koa/commit/93fe903fc966635a991bcf890cfc3427d33a1a08nvdPatchWEB
- github.com/advisories/GHSA-593f-38f6-jp5mghsaADVISORY
- github.com/koajs/koa/security/advisories/GHSA-593f-38f6-jp5mnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2025-25200ghsaADVISORY
- github.com/koajs/koa/blob/master/lib/request.jsnvdProduct
- github.com/koajs/koa/blob/master/lib/request.jsnvdProduct
- github.com/koajs/koa/releases/tag/2.15.4nvdRelease NotesWEB
News mentions
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