npm package report

Is @fastify/accepts-serializer safe?

1 known vulnerability, worst severity HIGH.

cvss
7.5

how bad it is if exploited, out of 10

epss
0.30%

chance of exploitation in the next 30 days

xyz score
3.3

CyberXYZ composite, out of 10

fig. 01 — GHSA-qxhc-wx3p-2wmg, the advisory selected below

// advisories

GHSA-qxhc-wx3p-2wmg

HIGHCVE-2026-7768

@fastify/accepts-serializer cached serializer-selection results keyed by the request Accept header without a size limit or eviction policy. A remote unauthenticated client could send many distinct but matching Accept header variants to make the cache grow unbounded. Under sustained load, this can exhaust the Node.js heap and crash the process.

Affected
<= 6.0.3
Fixed in
6.0.4
Weakness
CWE-770
Published
2026-05-08
Source
github

GHSANVDMITREreferencereference

// dependencies

0 direct

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 03:28 UTC. The most recent advisory here was published 2026-05-08. Updated continuously from NVD, GHSA, OSV and CNA feeds.

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Is @fastify/accepts-serializer safe? npm package security report | CyberXYZ