datamodel-code-generator: Authorization / request headers leaked to cross-origin redirect target when fetching remote schemas

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-55403
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-28 22:17:48 UTC
Updated2026-07-30 20:02:12 UTC
Descriptiondatamodel-code-generator generates Python data models from schema definitions. Prior to 0.63.0, src/datamodel_code_generator/http.py get_body reuses Authorization, Cookie, and Proxy-Authorization headers when following cross-origin redirects while fetching remote schemas, allowing credentials scoped to one schema host to be leaked to another redirect target. This issue is fixed in version 0.63.0.

Risk And Classification

Primary CVSS: v3.1 3.7 LOW from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.002110000 probability, percentile 0.115500000 (date 2026-08-01)

Problem Types: CWE-200 | CWE-601 | CWE-200 CWE-200: Exposure of Sensitive Information to an Unauthorized Actor | CWE-601 CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Koxudaxi Datamodel-code-generator affected < 0.63.0 Not specified

References

ReferenceSourceLinkTags
github.com/koxudaxi/datamodel-code-generator/commit/a585c037c8307b7aae81... [email protected] github.com
github.com/koxudaxi/datamodel-code-generator/security/advisories/GHSA-r5... 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/koxudaxi/datamodel-code-generator/releases/tag/0.63.0 [email protected] github.com
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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