Critical severity9.8NVD Advisory· Published Dec 27, 2022· Updated Jun 17, 2026

CVE-2017-20146

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
github.com/gorilla/handlersGo	< 1.3.0	1.3.0

Affected products

Gorillatoolkit/Handlers
cpe:2.3:a:gorillatoolkit:handlers:*:*:*:*:*:go:*:*
Range: <1.3.0
ghsa-coords
pkg:golang/github.com/gorilla/handlers
Range: < 1.3.0
Gorilla/Github.com/gorilla/handlersv5
Range: 0

Patches

Vulnerability mechanics

References

github.com/gorilla/handlers/commit/90663712d74cb411cbef281bc1e08c19d1a76145nvdPatchThird Party AdvisoryWEB
github.com/gorilla/handlers/pull/116nvdPatchThird Party AdvisoryWEB
github.com/advisories/GHSA-jcr6-mmjj-pchwghsaADVISORY
nvd.nist.gov/vuln/detail/CVE-2017-20146ghsaADVISORY
pkg.go.dev/vuln/GO-2020-0020nvdThird Party AdvisoryWEB

News mentions

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cvss	0.637
epss	0.001
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000