{"id":"GHSA-5pf6-2qwx-pxm2","summary":"Go SDK for CloudEvents's use of WithRoundTripper to create a Client leaks credentials","details":"### Impact\n_What kind of vulnerability is it? Who is impacted?_\nUsing cloudevents.WithRoundTripper to create a cloudevents.Client with an authenticated http.RoundTripper causes the go-sdk to leak credentials to arbitrary endpoints.\n\nThe relevant code is [here](https://github.com/cloudevents/sdk-go/blob/67e389964131d55d65cd14b4eb32d57a47312695/v2/protocol/http/protocol.go#L104-L110) (also inline, emphasis added):\n\n\u003cpre\u003eif p.Client == nil {\n  p.Client = **http.DefaultClient**\n}\n\nif p.roundTripper != nil {\n  p.Client.**Transport = p.roundTripper**\n}\n\u003c/pre\u003e\n\nWhen the transport is populated with an authenticated transport such as:\n- [oauth2.Transport](https://pkg.go.dev/golang.org/x/oauth2#Transport)\n- [idtoken.NewClient(...).Transport](https://pkg.go.dev/google.golang.org/api/idtoken#NewClient)\n\n... then http.DefaultClient is modified with the authenticated transport and will start to send Authorization tokens to\n**any endpoint** it is used to contact!\n\nFound and patched by: @tcnghia and @mattmoor\n\n### Patches\nv.2.15.2","aliases":["CVE-2024-28110","GO-2024-2618"],"modified":"2026-09-10T03:50:00.238160348Z","published":"2024-03-06T20:11:59Z","database_specific":{"github_reviewed_at":"2024-03-06T20:11:59Z","nvd_published_at":"2024-03-06T22:15:57Z","cwe_ids":["CWE-522"],"severity":"HIGH","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/cloudevents/sdk-go/security/advisories/GHSA-5pf6-2qwx-pxm2"},{"type":"WEB","url":"https://github.com/cloudevents/sdk-go/commit/de2f28370b0d2a0f64f92c0c6139fa4b8a7c3851"},{"type":"PACKAGE","url":"https://github.com/cloudevents/sdk-go"},{"type":"WEB","url":"https://github.com/cloudevents/sdk-go/blob/67e389964131d55d65cd14b4eb32d57a47312695/v2/protocol/http/protocol.go#L104-L110"}],"affected":[{"package":{"name":"github.com/cloudevents/sdk-go/v2","ecosystem":"Go","purl":"pkg:golang/github.com/cloudevents/sdk-go/v2"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.15.2"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 2.15.1","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/03/GHSA-5pf6-2qwx-pxm2/GHSA-5pf6-2qwx-pxm2.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}