npm package report

Is @fastify/reply-from safe?

3 known vulnerabilities, worst severity CRITICAL.

cvss
7.4

how bad it is if exploited, out of 10

epss
0.40%

chance of exploitation in the next 30 days

xyz score
4.6

CyberXYZ composite, out of 10

fig. 01 — GHSA-gwhp-pf74-vj37, the advisory selected below

// advisories

GHSA-gwhp-pf74-vj37

CRITICALCVE-2026-33805

@fastify/reply-from and @fastify/http-proxy 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 (like access control or identification headers) from upstream requests by listing them in the Connection header value. This affects applications using these plugins with custom header

Affected
<= 12.6.1
Fixed in
12.6.2
Weakness
CWE-644
Published
2026-04-16
Source
github

GHSANVDMITREreferencereference

// dependencies

6 direct, 1 carrying known advisories, worst HIGH

Sign in for dependency paths and remediation

// ai model usage

Tracked for PyPI packages. HuggingFace models declare Python dependencies, so npm packages are not covered.

Checked 2026-09-22 at 03:27 UTC. The most recent advisory here was published 2026-04-16. Updated continuously from NVD, GHSA, OSV and CNA feeds.

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Is @fastify/reply-from safe? npm package security report | CyberXYZ