Back
CVE-2026-25882
Fiber has a Denial of Service Vulnerability via Route Parameter Overflow
Medium5.5EPSS 0.67%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 4.0 | Medium5.5 | 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 |
| NVDNVD · Analyzed | 4.0 | Medium5.5 | 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 (exploitation in 30 days)
- 0.67% · top 48% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: yes · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/gofiber/fiber/v2GHSA-mrq8-rjmw-wpq3 (opens in a new tab)
- Gogithub.com/gofiber/fiber/v3GHSA-mrq8-rjmw-wpq3 (opens in a new tab)
References (4)
- https://github.com/gofiber/fiber/security/advisories/GHSA-mrq8-rjmw-wpq3 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/gofiber/fiber/pull/3962 (opens in a new tab)x_refsource_MISC
- https://github.com/gofiber/fiber/blob/main/path.go#L514 (opens in a new tab)x_refsource_MISC
- https://github.com/gofiber/fiber/blob/v2/path.go#L516 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-mrq8-rjmw-wpq3 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-25882)Record last updated .