Medium 5.5Published Feb 24, 2026

CVE-2026-25882Fiber has a Denial of Service Vulnerability via Route Parameter Overflow

Updated under an hour ago (Oct 27, 2026, 9:20 AM ET)

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It affects gofiber fiber. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for gofiber fiber

Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-129
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Feb 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

gofiber fiber gofiber:fiber (from the name)	from 2.0.0, < 2.52.12; from 3.0.0, < 3.1.0	CNA record
gofiber fiber gofiber:fiber	from 2.0.0 before 2.52.12; from 3.0.0 before 3.1.0	NVD

References

References

https://github.com/gofiber/fiber/security/advisories/GHSA-mrq8-rjmw-wpq3	x-refsource-confirm, exploit, vendor-advisory
https://github.com/gofiber/fiber/pull/3962	x-refsource-misc, issue-tracking, patch
https://github.com/gofiber/fiber/blob/main/path.go#L514	x-refsource-misc, product
https://github.com/gofiber/fiber/blob/v2/path.go#L516	x-refsource-misc, product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.