go package report

Is github.com/valyala/fasthttp safe?

2 known vulnerabilities, worst severity HIGH.

cvss

5.9

how bad it is if exploited, out of 10

epss

2.5%

chance of exploitation in the next 30 days

xyz score

3.7

CyberXYZ composite, out of 10

fig. 01 — GHSA-fx95-883v-4q4h, the advisory selected below

// advisories

GHSA-fx95-883v-4q4h

HIGHCVE-2022-21221

The package github.com/valyala/fasthttp before 1.34.0 is vulnerable to Directory Traversal via the ServeFile function, due to improper sanitization. It is possible to be exploited by using a backslash %5c character in the path. Note: This security issue impacts Windows users only.

Affected: < 1.34.0
Fixed in: 1.34.0
Weakness: CWE-22
Published: 2022-03-18
Source: github

GHSA NVD MITRE reference reference reference reference reference reference

// dependencies

0 direct

// ai model usage

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

Checked 2026-09-22 at 03:30 UTC. The most recent advisory here was published 2026-08-18. Updated continuously from NVD, GHSA, OSV and CNA feeds.

Is github.com/valyala/fasthttp safe? go package security report | CyberXYZ