@fastify/reply-from vulnerable to improper certificate validation in built-in HTTPS transports
@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.
CVE-2026-107318
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-107318
@fastify/reply-from
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "@fastify/reply-from",
"product": "@fastify/reply-from",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "12.7.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "12.7.0",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/@fastify/reply-from",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-107318
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #16218 · Revision 1
- Added to Heist Feed
- Publisher date