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

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation poc

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Gofiber
  • Fiber

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References
Link Providers
https://github.com/gofiber/fiber/blob/main/path.go#L514 cve-icon cve-icon
https://github.com/gofiber/fiber/blob/v2/path.go#L516 cve-icon cve-icon
https://github.com/gofiber/fiber/pull/3962 cve-icon cve-icon
https://github.com/gofiber/fiber/security/advisories/GHSA-mrq8-rjmw-wpq3 cve-icon cve-icon
History

Wed, 25 Feb 2026 12:00:00 +0000

Type Values Removed Values Added
First Time appeared Gofiber
Gofiber fiber
Vendors & Products Gofiber
Gofiber fiber

Tue, 24 Feb 2026 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 24 Feb 2026 21:30:00 +0000

Type Values Removed Values Added
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 3.0.1 patches the issue in the v3 branch. 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.

Tue, 24 Feb 2026 21:15:00 +0000

Type Values Removed Values Added
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 3.0.1 patches the issue in the v3 branch.
Title Fiber has a Denial of Service Vulnerability via Route Parameter Overflow
Weaknesses CWE-129
References
Metrics cvssV4_0

{'score': 5.5, 'vector': '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'}
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-02-24T21:05:28.211Z

Updated: 2026-02-24T21:39:51.170Z

Reserved: 2026-02-06T21:08:39.129Z

Link: CVE-2026-25882

cve-icon Vulnrichment

Updated: 2026-02-24T21:39:44.016Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-02-24T21:16:29.640

Modified: 2026-02-24T22:16:31.310

Link: CVE-2026-25882

cve-icon Redhat

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