GHSA-5PF6-2QWX-PXM2

Vulnerability from github – Published: 2024-03-06 20:11 – Updated: 2026-02-17 19:40
VLAI
Summary
Go SDK for CloudEvents's use of WithRoundTripper to create a Client leaks credentials
Details

Impact

What kind of vulnerability is it? Who is impacted? Using cloudevents.WithRoundTripper to create a cloudevents.Client with an authenticated http.RoundTripper causes the go-sdk to leak credentials to arbitrary endpoints.

The relevant code is here (also inline, emphasis added):

if p.Client == nil {
  p.Client = **http.DefaultClient**
}

if p.roundTripper != nil {
  p.Client.**Transport = p.roundTripper**
}

When the transport is populated with an authenticated transport such as: - oauth2.Transport - idtoken.NewClient(...).Transport

... then http.DefaultClient is modified with the authenticated transport and will start to send Authorization tokens to any endpoint it is used to contact!

Found and patched by: @tcnghia and @mattmoor

Patches

v.2.15.2

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Show details on source website
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2.15.1"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/cloudevents/sdk-go/v2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.15.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-28110"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-522"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-03-06T20:11:59Z",
    "nvd_published_at": "2024-03-06T22:15:57Z",
    "severity": "HIGH"
  },
  "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",
  "id": "GHSA-5pf6-2qwx-pxm2",
  "modified": "2026-02-17T19:40:16Z",
  "published": "2024-03-06T20:11:59Z",
  "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"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Go SDK for CloudEvents\u0027s use of WithRoundTripper to create a Client leaks credentials"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.