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BREW-ansible-CVE-2026-49264 — Oauthlib : Unsafe JSONP callback injection in RevocationEndpoint allows arbitrary JavaScript response generation

Affected: Homebrew: ansible

### Summary

When `enable_jsonp=True`, oauthlib's `RevocationEndpoint` reflects the user-supplied `callback` parameter directly into JavaScript response bodies on both success and error paths without validating that it is a legal JSONP callback name. This allows arbitrary JavaScript response generation instead of a restricted function call, making the documented JSONP revocation feature unsafe for browser-based JSONP consumption when attackers can influence `callback`.

### Details

The issue is in `oauthlib/oauth2/rfc6749/endpoints/revocation.py`.

When `enable_jsonp=True` is passed to the `RevocationEndpoint` constructor, two code paths wrap the response body using the user-supplied `request.callback` parameter:

```python # Error response path (line 72-73): if self.enable_jsonp and request.callback: response_body = '{}({});'.format(request.callback, response_body)

# Success response path (line 81-82): if self.enable_jsonp and request.callback: response_body = request.callback + '();' ```

The `request.callback` value comes from HTTP request parameters, either the query string or POST body, via the `Request` class in `oauthlib/common.py` (lines 394-395), which merges query and body parameters into `_params`. Any value the client sends as `callback` is used verbatim.

There is no validation of any kind on the callback parameter: - No check that it is a valid JavaScript identifier - No whitelist of allowed characters - No escaping or sanitization

A safe JSONP imple…

GHSA-hj66-6f7g-4r5v — Oauthlib : Unsafe JSONP callback injection in RevocationEndpoint allows arbitrary JavaScript response generation

Affected: PyPI: oauthlib

### Summary

### Details

The issue is in `oauthlib/oauth2/rfc6749/endpoints/revocation.py`.

When `enable_jsonp=True` is passed to the `RevocationEndpoint` constructor, two code paths wrap the response body using the user-supplied `request.callback` parameter:

```python # Error response path (line 72-73): if self.enable_jsonp and request.callback: response_body = '{}({});'.format(request.callback, response_body)

# Success response path (line 81-82): if self.enable_jsonp and request.callback: response_body = request.callback + '();' ```

There is no validation of any kind on the callback parameter: - No check that it is a valid JavaScript identifier - No whitelist of allowed characters - No escaping or sanitization

A safe JSONP imple…

openSUSE-SU-2026:11973-1 — python313-oauthlib-4.0.0-1.1 on GA media

python313-oauthlib-4.0.0-1.1 on GA media

PYSEC-2026-4113 — Oauthlib : Unsafe JSONP callback injection in RevocationEndpoint allows arbitrary JavaScript response generation

Affected: PyPI: oauthlib

### Summary

### Details

The issue is in `oauthlib/oauth2/rfc6749/endpoints/revocation.py`.

When `enable_jsonp=True` is passed to the `RevocationEndpoint` constructor, two code paths wrap the response body using the user-supplied `request.callback` parameter:

```python # Error response path (line 72-73): if self.enable_jsonp and request.callback: response_body = '{}({});'.format(request.callback, response_body)

# Success response path (line 81-82): if self.enable_jsonp and request.callback: response_body = request.callback + '();' ```

There is no validation of any kind on the callback parameter: - No check that it is a valid JavaScript identifier - No whitelist of allowed characters - No escaping or sanitization

A safe JSONP imple…