CVEvulnerability
CVE-2023-41338
5.3 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2023-09-08
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CVSS 3.1 ([email protected])
- 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weaknesses
- CWE-670
Description
Fiber is an Express inspired web framework built in the go language. Versions of gofiber prior to 2.49.2 did not properly restrict access to localhost. This issue impacts users of our project who rely on the `ctx.IsFromLocal` method to restrict access to localhost requests. If exploited, it could allow unauthorized access to resources intended only for localhost. Setting `X-Forwarded-For: 127.0.0.1` in a request from a foreign host, will result in true for `ctx.IsFromLocal`. Access is limited to the scope of the affected process. This issue has been patched in version `2.49.2` with commit `b8c9ede6`. Users are advised to upgrade. There are no known workarounds to remediate this vulnerability without upgrading to the patched version.
Affected configurations
• gofiber fiber (< 2.49.2)
Related
Weakness · CWE (1)
- CWE-670 Always-Incorrect Control Flow Implementation weakness
References
- https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Forwarded-For Technical Description
- https://docs.gofiber.io/api/ctx#isfromlocal Product
- https://github.com/gofiber/fiber/commit/b8c9ede6efa231116c4bd8bb9d5e03eac1cb76dc Patch
- https://github.com/gofiber/fiber/security/advisories/GHSA-3q5p-3558-364f Vendor Advisory
- https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Forwarded-For Technical Description
- https://docs.gofiber.io/api/ctx#isfromlocal Product
- https://github.com/gofiber/fiber/commit/b8c9ede6efa231116c4bd8bb9d5e03eac1cb76dc Patch
- https://github.com/gofiber/fiber/security/advisories/GHSA-3q5p-3558-364f Vendor Advisory