CVE-2025-54801: GO-2025-3845 - Fiber Crashes in BodyParser Due to Unvalidated Large Slice Index in Decoder in github.com/gofiber/fiber

CVE-2025-54801 · Severity: medium · CVSS 4 · Published 2025-08-11

Fiber Crashes in BodyParser Due to Unvalidated Large Slice Index in Decoder in github.com/gofiber/fiber

Technologies: github.com/gofiber/fiber/v2 (Go). Vendors: Go.

Quick answers

Is CVE-2025-54801 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-54801 being exploited in the wild.
How severe is CVE-2025-54801?
Medium severity, with a CVSS score of 4, published 11 August 2025.
Which products and versions are affected?
github.com/gofiber/fiber/v2 (Go) SEMVER:introduced=0,fixed=2.52.9.
Is there a fix for CVE-2025-54801?
Yes. github.com/gofiber/fiber/v2 (Go): upgrade to 2.52.9 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-54801?
Check whether you run github.com/gofiber/fiber/v2 (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • github.com/gofiber/fiber/v2 (Go): upgrade to 2.52.9 or later
    go get github.com/gofiber/fiber/v2@v2.52.9

Affected products

  • github.com/gofiber/fiber/v2 (Go) SEMVER:introduced=0,fixed=2.52.9

Identifiers

  • CVE-2025-54801
  • GHSA-qx2q-88mx-vhg7
  • GO-2025-3845

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.