Moderate severityNVD Advisory· Published Feb 24, 2026· Updated Feb 24, 2026
Fiber has a Denial of Service Vulnerability via Route Parameter Overflow
CVE-2026-25882
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/gofiber/fiber/v2Go | < 2.52.12 | 2.52.12 |
github.com/gofiber/fiber/v3Go | < 3.1.0 | 3.1.0 |
Affected products
7- osv-coords6 versionspkg:apk/chainguard/gatuspkg:apk/chainguard/gatus-fipspkg:apk/wolfi/gatuspkg:golang/github.com/gofiber/fiber/v2pkg:golang/github.com/gofiber/fiber/v3pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2015.6
< 5.35.0-r1+ 5 more
- (no CPE)range: < 5.35.0-r1
- (no CPE)range: < 5.35.0-r1
- (no CPE)range: < 5.35.0-r1
- (no CPE)range: < 2.52.12
- (no CPE)range: < 3.1.0
- (no CPE)range: < 0.0.20260226T182644-150000.1.149.1
Patches
Vulnerability mechanics
References
7- github.com/advisories/GHSA-mrq8-rjmw-wpq3ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-25882ghsaADVISORY
- github.com/gofiber/fiber/blob/main/path.goghsax_refsource_MISCWEB
- github.com/gofiber/fiber/blob/v2/path.goghsax_refsource_MISCWEB
- github.com/gofiber/fiber/pull/3962ghsax_refsource_MISCWEB
- github.com/gofiber/fiber/security/advisories/GHSA-mrq8-rjmw-wpq3ghsax_refsource_CONFIRMWEB
- pkg.go.dev/vuln/GO-2026-4543ghsaWEB
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