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4 vulnerabilities found for @fastify/reply-from by @fastify/reply-from
CVE-2026-117518 (GCVE-0-2026-117518)
Vulnerability from cvelistv5
Published
2026-11-02 10:39
Modified
2026-11-02 16:58
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Summary
@fastify/reply-from is a Fastify plugin that forwards requests to an upstream HTTP server. In versions up to and including 12.8.0, the plugin validated proxy paths against forward-slash dot-segments only and then built the target with the WHATWG URL parser, which normalizes a backslash and its percent-encoded form to a forward slash on the http, https, ws, and wss schemes. A path that uses backslash dot-segments therefore bypasses the traversal check and resolves to a different upstream path, so an application that scopes proxying to an upstream prefix, or relies on route guards in front of the forwarding call, can have an unauthenticated request escape the intended prefix and reach other upstream endpoints. The resulting access to unintended upstream resources is primarily a confidentiality impact with limited integrity impact. The issue is fixed in @fastify/reply-from 12.8.1, where the path is normalized and any segment resolving to a single or double dot, along with control characters and ambiguous whitespace, is rejected before the URL is constructed, and users should upgrade to 12.8.1 or later. There is no workaround other than upgrading.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| @fastify/reply-from | @fastify/reply-from |
Version: 0 ≤ |
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CVE-2026-107318 (GCVE-0-2026-107318)
Vulnerability from cvelistv5
Published
2026-10-08 20:32
Modified
2026-10-09 11:50
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-295 - Improper Certificate Validation
Summary
@fastify/reply-from is a Fastify plugin that forwards requests to an upstream HTTP or HTTPS server. In versions prior to 12.7.0, all of the built-in HTTPS transports override the secure default and set rejectUnauthorized to false, so the proxy does not verify the TLS certificate of the upstream even when the application points it at an https upstream in the default configuration. An on-path network attacker can therefore impersonate the configured HTTPS upstream, read the credentials and request bodies the proxy forwards, and return forged responses that the application trusts. The issue is fixed in @fastify/reply-from 12.7.0, and users should upgrade to 12.7.0 or later. As a workaround, pass an explicit rejectUnauthorized true on the transport, supply an already configured undici instance, or use the undici global agent.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| @fastify/reply-from | @fastify/reply-from |
Version: 0 ≤ |
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CVE-2026-16158 (GCVE-0-2026-16158)
Vulnerability from cvelistv5
Published
2026-07-18 12:28
Modified
2026-07-20 15:15
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-441 - Unintended Proxy or Intermediary ('Confused Deputy')
Summary
Impact: @fastify/reply-from versions from 8.3.1 up to but not including 12.6.4 build the internal URL cache key by concatenating the destination and source path without a delimiter. Different destination and source pairs can therefore produce the same key while resolving to different upstream URLs. When getUpstream selects an upstream from request data, a URL cached for one upstream can be reused for a request intended for another upstream, causing cross-upstream data access and modification. The default configuration is affected. Setting disableCache to true prevents the behavior. Patches: upgrade to @fastify/reply-from 12.6.4. Workarounds: pass disableCache: true when registering the plugin.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| @fastify/reply-from | @fastify/reply-from |
Version: 8.3.1 ≤ |
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CVE-2026-33805 (GCVE-0-2026-33805)
Vulnerability from cvelistv5
Published
2026-04-15 10:13
Modified
2026-07-15 01:06
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax
Summary
@fastify/reply-from v12.6.1 and earlier and @fastify/http-proxy v11.4.3 and earlier process the client's Connection header after the proxy has added its own headers via rewriteRequestHeaders. This allows attackers to retroactively strip proxy-added headers from upstream requests by listing them in the Connection header value. Any header added by the proxy for routing, access control, or security purposes can be selectively removed by a client. @fastify/http-proxy is also affected as it delegates to @fastify/reply-from.
Upgrade to @fastify/reply-from v12.6.2 or @fastify/http-proxy v11.4.4 or later.
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| @fastify/reply-from | @fastify/reply-from |
Version: 0 ≤ |
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