CVE-2026-25882

Name: CVE-2026-25882
Creator: NVD / NIST
Published: 2026-02-24T21:16:29.64+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.59%

Last modified Jun 17, 2026

CVE-2026-25882 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Fiber is an Express inspired web framework written in Go. A denial of service vulnerability exists in Fiber v2 and v3 that allows remote attackers to crash the application by sending requests to routes with more than 30 parameters. EPSS estimates a 0.59% chance of exploitation in the next 30 days.

Description

Fiber is an Express inspired web framework written in Go. A denial of service vulnerability exists in Fiber v2 and v3 that allows remote attackers to crash the application by sending requests to routes with more than 30 parameters. The vulnerability results from missing validation during route registration combined with an unbounded array write during request matching. Version 2.52.12 patches the issue in the v2 branch and 3.1.0 patches the issue in the v3 branch.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS 4.0

5.5/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.59%

43.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-129

Affected Software

Vendor	Product	Versions
Gofiber	Fiber	>= 2.0.0, < 2.52.12
Gofiber	Fiber	>= 3.0.0, < 3.1.0

References

https://github.com/gofiber/fiber/blob/main/path.go#L514Product
https://github.com/gofiber/fiber/blob/v2/path.go#L516Product
https://github.com/gofiber/fiber/pull/3962Issue Tracking, Patch
https://github.com/gofiber/fiber/security/advisories/GHSA-mrq8-rjmw-wpq3Exploit, Vendor Advisory

Timeline

Published: Feb 24, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-25882?

How severe is CVE-2026-25882?

CVE-2026-25882 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.59% probability of exploitation in the next 30 days.

How do I fix CVE-2026-25882?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-25882?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST