HOMEVULNERABILITIESCVE-2017-20146
CRITICAL

CVE-2017-20146

CWE-346Published: December 27, 2022· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2017-20146 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

gorillatoolkit1 product(s)
handlers
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/gorilla/handlers/commit/90663712d74cb411cbef281bc1e08c19d1a76145
PATCHhttps://github.com/gorilla/handlers/pull/116
PATCHhttps://github.com/gorilla/handlers/commit/90663712d74cb411cbef281bc1e08c19d1a76145
PATCHhttps://github.com/gorilla/handlers/pull/116
ADVISORYhttps://pkg.go.dev/vuln/GO-2020-0020
ADVISORYhttps://pkg.go.dev/vuln/GO-2020-0020

All References (6)

→
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

Quick Facts

CVE IDCVE-2017-20146
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-346
CISA KEVNo
Affected1 vendor(s)
PublishedDec 27, 2022

Related CVEs (CWE-346)

CVE-2023-30856
10.0
CVE-2026-42901
10.0
CVE-2022-23764
9.8
CVE-2019-4640
9.8
CVE-2020-26527
9.8
CVE-2019-8069
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2017-20146 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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