Fiber
CVE-2026-25882
HIGH
GHSA-mrq8-rjmw-wpq3
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from GitHub Advisory.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
4DescriptionGitHub Advisory
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.
AnalysisAI
Fiber web framework versions 2 and 3 are vulnerable to denial of service attacks when processing requests to routes containing more than 30 parameters, enabling remote attackers to crash affected applications without authentication. The vulnerability stems from insufficient validation during route registration and unbounded array writes in request matching logic. Public exploit code exists for this high-severity flaw, though patches are available in Fiber v2.52.12 and v3.1.0.
Technical ContextAI
Classified as CWE-129 (Improper Validation of Array Index). Affects the Go. A denial of component of Fiber. 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.
RemediationAI
A vendor patch is available — apply it immediately. Restrict network access to the affected service where possible.
Fiber is a web framework written in go. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable,
Unbounded memory allocation in Fiber v3 (prior to 3.1.0) allows unauthenticated remote attackers to trigger denial of se
Fiber web framework versions 3.0.0 and earlier on Windows contain a path traversal vulnerability that allows remote atta
Fiber is an Express-inspired web framework written in Go A vulnerability present in versions prior to 2.52.5 is a sessio
Go Fiber web framework before 2.52.11 has a weak PRNG vulnerability (on Go < 1.24) that makes session tokens predictable
Fiber is an express inspired web framework written in Go. Rated high severity (CVSS 8.8), this vulnerability is remotely
Fiber is an express inspired web framework written in Go. Rated high severity (CVSS 8.8), this vulnerability is remotely
In Fiber before version 1.12.6, the filename that is given in c.Attachment() (https://docs.gofiber.io/ctx#attachment) is
Fiber is an Express inspired web framework built in the go language. Rated medium severity (CVSS 5.3), this vulnerabilit
Fiber is an Express inspired web framework written in Go. Rated high severity (CVSS 8.7), this vulnerability is remotely
Fiber is an Express-inspired web framework written in Go. Rated high severity (CVSS 7.7), this vulnerability is remotely
Same weakness CWE-129 – Improper Validation of Array Index
View allSame technique Denial Of Service
View allVendor StatusVendor
SUSE
Severity: High| Product | Status |
|---|---|
| openSUSE Leap 15.6 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | Fixed |
| openSUSE Leap 15.5 | Fixed |
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External POC / Exploit Code
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