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TI-2020-11886 Aliases CVE-2020-15111GHSA-9cx9-x2gp-9qvh

CRLF vulnerability in Fiber

Priority LOW 26CWE-74Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

In Fiber before version 1.12.6, the filename that is given in c.Attachment() (https://docs.gofiber.io/ctx#attachment) is not escaped, and therefore vulnerable for a CRLF injection attack. I.e. an attacker could upload a custom filename and then give the link to the victim. With this filename, the attacker can change the name of the downloaded file, redirect to another site, change the authorization header, etc. A possible workaround is to serialize the input before passing it to ctx.Attachment().

Why it matters now

EPSS 0.00861 58th percentileScored 2026-11-07
Fix Fixed fiber (gofiber): 1.12.6github.com/gofiber/fiber (Go): 1.12.6

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
gofiberfiberbefore 1.12.61.12.6Patch availableCNA
—github.com/gofiber/fiber (Go)before 1.12.61.12.6Patch availableGHSA-9cx9-x2gp-9qvh
  • fiber Vendorgofiber Affected before 1.12.6 Fixed in 1.12.6 Patch available CNA
  • github.com/gofiber/fiber (Go) Vendor— Affected before 1.12.6 Fixed in 1.12.6 Patch available GHSA-9cx9-x2gp-9qvh

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:gofiber:fiber:*:*:*:*:*:*:*:*before 1.12.6Vulnerablegofiber
  • cpe:2.3:a:gofiber:fiber:*:*:*:*:*:*:*:* Versions before 1.12.6 Vulnerable ·gofiber

Remediation

  • Fix · CNA fiber (gofiber) Fixed in 1.12.6
  • Fix · GHSA-9cx9-x2gp-9qvh github.com/gofiber/fiber (Go) Fixed in 1.12.6 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-15111
  2. 2026-10-03 Alias added: GHSA-9cx9-x2gp-9qvh

References

Patch 1

Advisory 2

Other 4

  • TI-2025-34555 Fiber Susceptible to Crash via `BodyParser` Due to Unvalidated Large Slice Index in Decoder CVSS 4.0HIGH 8.7
  • TI-2024-16578 Fiber has Insecure CORS Configuration, Allowing Wildcard Origin with Credentials CVSS 3.1CRITICAL 9.8
  • TI-2025-30446 Fiber panics when fiber.Ctx.BodyParser parses invalid range index CVSS 4.0HIGH 7.7
  • TI-2026-23477 github.com/gofiber/fiber/v3 cache middleware can mix responses across query parameters CVSS 3.1MEDIUM 6.5
  • TI-2026-20922 Fiber has a Denial of Service Vulnerability via Route Parameter Overflow CVSS 4.0MEDIUM 5.5
  • TI-2026-30834 Fiber: XSS in AutoFormat Content Negotiation CVSS 4.0MEDIUM 5.3
See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences