Application crash via unbounded route parameter write
Published Feb 24, 2026 · Updated Feb 24, 2026
Denial of service in GoFiber Fiber 2.0.0 through 2.52.11 and 3.0.0 allows remote attackers to crash applications via HTTP requests. The router register function accepts more than 30 route parameters, and path matching writes their values past the fixed 30-element parameter array. Exploitation requires an application-defined route with more than 30 parameters; one unauthenticated matching request triggers a Go index-out-of-range panic.
Summary
What happened
Denial of service in GoFiber Fiber 2.0.0 through 2.52.11 and 3.0.0 allows remote attackers to crash applications via HTTP requests. The router register function accepts more than 30 route parameters, and path matching writes their values past the fixed 30-element parameter array. Exploitation requires an application-defined route with more than 30 parameters; one unauthenticated matching request triggers a Go index-out-of-range panic.
The record
- CVE
- CVE-2026-25882
- Published
- Feb 24, 2026
- Updated
- Feb 24, 2026
- Vendor
- GoFiber
- Product
- Fiber
- Classifications
- CWE-129, CAPEC-100, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 24, 2026CVE publishedPublication date reported by the CVE source.
- Feb 24, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 2.0.0, < 2.52.12
- Affected versionversion=>= 3.0.0, < 3.1.0
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- GoFiber route parameter overflow proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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