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Vendor

koajs

6 known vulnerabilities.

koajs at a glance

Last 12 months
1
Critical · all time
1
Exploited · all time
0
Public exploit · all time
2
New vulnerabilities per month · last 12 months
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Products

koa 5 cors 1
All Critical High Medium Low Exploited only Public exploit

6 results · Feed

  • High 7.5
    CVE-2026-27959 Public exploit

    Koa has Host Header Injection via `ctx.hostname`

    Koa is middleware for Node.js using ES2017 async functions. Prior to versions 3.1.2 and 2.16.4, Koa's `ctx.hostname` API performs naive parsing of the HTTP Host header, extracting everything before the first colon without validating the input conforms to RFC …

    koajs koa koa npm
  • Medium 4.3
    CVE-2025-62595

    Koa Vulnerable to Open Redirect via Trailing Double-Slash (//) in back Redirect Logic

    Koa is expressive middleware for Node.js using ES2017 async functions. In versions 2.16.2 to before 2.16.3 and 3.0.1 to before 3.0.3, a bypass to CVE-2025-8129 was discovered in the Koa.js framework affecting its back redirect functionality. In certain circum…

    koajs koa koa npm
  • Low 3.5
    CVE-2025-8129

    KoaJS Koa HTTP Header response.js back redirect

    A vulnerability, which was classified as problematic, was found in KoaJS Koa up to 3.0.0. Affected is the function back in the library lib/response.js of the component HTTP Header Handler. The manipulation of the argument Referrer leads to open redirect. It i…

    koajs koa koa npm
  • Medium 5.0
    CVE-2025-32379

    XSS at ctx.redirect() function in Koajs

    Koa is expressive middleware for Node.js using ES2017 async functions. In koa < 2.16.1 and < 3.0.0-alpha.5, passing untrusted user input to ctx.redirect() even after sanitizing it, may execute javascript code on the user who use the app. This issue is patched…

    koajs koa koa npm
  • Critical 9.2
    CVE-2025-25200 Public exploit

    Koa has Inefficient Regular Expression Complexity

    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 …

    koajs koa koa npm
  • High 8.6
    CVE-2023-49803

    @koa/cors has overly permissive origin policy

    @koa/cors npm provides Cross-Origin Resource Sharing (CORS) for koa, a web framework for Node.js. Prior to version 5.0.0, the middleware operates in a way that if an allowed origin is not provided, it will return an `Access-Control-Allow-Origin` header with t…

    koajs cors @koa/cors npm