vulnerability / NVI-00015033 / Revision 1
datamodel-code-generator: Authorization / request headers leaked to cross-origin redirect target when fetching remote schemas
GitHub lists this reviewed advisory for datamodel-code-generator. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
3.7 low
GitHub source severity; exploitability and local consequence require separate evidence.
As of · GitHub Advisory Database
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
datamodel-code-generator
source listed<= 0.62.0
### Summary When `datamodel-code-generator` fetches a remote schema and follows an HTTP redirect, it re-sends the original request headers, including any `Authorization` header, to the redirect target even when the redirect changes origin (host/port/scheme). Credentials that an operator scoped to a trusted schema host are therefore forwarded to an attacker-controlled or otherwise different host, leaking them. ### Details In `src/datamodel_code_generator/http.py`, `get_body()` follows redirects manually and re-issues each hop with the same `headers` argument, with no check that the origin is unchanged: ```python for redirect_count in range(MAX_HTTP_REDIRECTS + 1): _validate_url_for_fetch(current_url, allow_private_network=allow_private_network) response = httpx.get(current_url, headers=headers, follow_redirects=False, ...) # same headers every hop if (redirect_url := _get_redirect_url(httpx, current_url, response)) is None: break current_url = redirect_url ``` Browsers and HTTP clients such as `requests`/`httpx` strip `Authorization` when a redirect crosses origin; here it is preserved unconditionally. Headers are operator-supplied via `--http-headers`
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database
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04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
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- GHSA-r5vv-ff45-prp2 ↗
GitHub Advisory Database · vendor advisory
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Public revision history
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- Revision 1 ·
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