CVE-2017-20146

Name: CVE-2017-20146
Creator: NVD / NIST
Published: 2022-12-27T22:15:11.07+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.70%

Last modified Jun 17, 2026

CVE-2017-20146 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Usage of the CORS handler may apply improper CORS headers, allowing the requester to explicitly control the value of the Access-Control-Allow-Origin header, which bypasses the expected behavior of the Same Origin Policy.. EPSS estimates a 0.70% chance of exploitation in the next 30 days.

Description

Usage of the CORS handler may apply improper CORS headers, allowing the requester to explicitly control the value of the Access-Control-Allow-Origin header, which bypasses the expected behavior of the Same Origin Policy.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.70%

48.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-346

Affected Software

Vendor	Product	Versions
Gorillatoolkit	Handlers	< 1.3.0

References

https://github.com/gorilla/handlers/commit/90663712d74cb411cbef281bc1e08c19d1a76145Patch, Third Party Advisory
https://github.com/gorilla/handlers/pull/116Patch, Third Party Advisory
https://pkg.go.dev/vuln/GO-2020-0020Third Party Advisory
https://github.com/gorilla/handlers/commit/90663712d74cb411cbef281bc1e08c19d1a76145Patch, Third Party Advisory
https://github.com/gorilla/handlers/pull/116Patch, Third Party Advisory
https://pkg.go.dev/vuln/GO-2020-0020Third Party Advisory

Timeline

Published: Dec 27, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-20146?

How severe is CVE-2017-20146?

CVE-2017-20146 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.70% probability of exploitation in the next 30 days.

How do I fix CVE-2017-20146?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-20146?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST