parseWildcardRules in Gin-Gonic CORS middleware before 1.6.0 mishandles a wildcard at the end of an origin string, e.g., https://example.community/* is allowed when the intention is that only https://example.com/* should be allowed, and http://localhost.example.com/* is allowed when the intention is that only http://localhost/* should be allowed.

Affected: Go: github.com/gin-gonic/gin, Go: github.com/gin-contrib/cors

parseWildcardRules in Gin-Gonic CORS middleware before 1.6.0 mishandles a wildcard at the end of an origin string, e.g., https://example.community/* is allowed when the intention is that only https://example.com/* should be allowed, and http://localhost.example.com/* is allowed when the intention is that only http://localhost/* should be allowed.

github.com/gin-contrib/cors: Gin mishandles a wildcard in the origin string in github.com/gin-contrib/cors golang: net/http, x/net/http2: unlimited number of CONTINUATION frames causes DoS golang: net/http/cookiejar: incorrect forwarding of sensitive headers and cookies on HTTP redirect containers/image: digest type does not guarantee valid type braces: fails to limit the number of characters it can handle golang: net: malformed DNS message can cause infinite loop jose-go: improper handling of highly compressed data follow-redirects: Possible credential leak node-tar: denial of service while parsing a tar file due to lack of folders depth validation moby: external DNS requests from 'internal' networks could lead to data exfiltration express: cause malformed URLs to be evaluated webpack-dev-middleware: lack of URL validation may lead to file leak axios: axios: Server-Side Request Forgery

Affected: Ubuntu:20.04:LTS: golang-github-gin-contrib-cors, Ubuntu:22.04:LTS: golang-github-gin-contrib-cors, Ubuntu:24.04:LTS: golang-github-gin-contrib-cors, Ubuntu:25.10: golang-github-gin-contrib-cors, Ubuntu:26.04:LTS: golang-github-gin-contrib-cors

parseWildcardRules in Gin-Gonic CORS middleware before 1.6.0 mishandles a wildcard at the end of an origin string, e.g., https://example.community/* is allowed when the intention is that only https://example.com/* should be allowed, and http://localhost.example.com/* is allowed when the intention is that only http://localhost/* should be allowed.