Critical, CVSS 9.3GoPublished
Some CORS middleware allow untrusted origins
GHSA-v84h-653v-4pq9
- Affected
- Go github.com/jub0bs/fcors <= 0.8.0
- Fixed in
- 0.9.0· Vendor fix available
- Issue
- Impact Some CORS middleware (more specifically those created by specifying two or more origin patterns whose hosts share a proper suffix) incorrectly allow some untrusted origins, thereby opening the door to cross-origin attacks from the untrusted origins in question. For example, specifying origin patterns https://foo.com and https://bar.com (in that order) would yield a middleware that would incorrectly allow untrusted origin https://barfoo.com. Patches Patched in v0.9.0. Workarounds None.
Recommended action: Upgrade to 0.9.0 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.