High severity7.5NVD Advisory· Published Jul 28, 2026· Updated Aug 6, 2026
CVE-2026-55391
CVE-2026-55391
Description
datamodel-code-generator generates Pydantic v2 models, dataclasses, TypedDict, and msgspec.Struct from OpenAPI, JSON Schema, GraphQL, Avro, Protobuf, and raw JSON, YAML, or CSV. Prior to 0.63.0, datamodel-code-generator validates a URL host once in src/datamodel_code_generator/http.py through get_body, _validate_url_for_fetch, and _get_ips_from_host, but then lets httpx resolve the host again for the connection, allowing DNS rebinding to bypass allow_private_network=False and reach internal services. This issue is fixed in version 0.63.0.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
datamodel-code-generatorPyPI | < 0.63.0 | 0.63.0 |
Affected products
4cpe:2.3:a:koxudaxi:datamodel-code-generator:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:koxudaxi:datamodel-code-generator:*:*:*:*:*:*:*:*range: <0.63.0
- (no CPE)range: <0.63.0
- osv-coords2 versionspkg:apk/chainguard/label-studiopkg:rpm/opensuse/python-datamodel-code-generator&distro=openSUSE%20Tumbleweed
< 1.23.0-r11+ 1 more
- (no CPE)range: < 1.23.0-r11
- (no CPE)range: < 0.72.3-1.1
Patches
Vulnerability mechanics
References
5- github.com/koxudaxi/datamodel-code-generator/commit/25c8b7e497419eb20b230fa3318c04f9bebc5a6fnvdPatchWEB
- github.com/koxudaxi/datamodel-code-generator/security/advisories/GHSA-vx7x-vcc2-c44gnvdExploitVendor AdvisoryWEB
- gist.github.com/thegr1ffyn/c1d54dd6ff2a4c0d7d0dabe00c4985f4nvdThird Party Advisory
- github.com/advisories/GHSA-vx7x-vcc2-c44gghsaADVISORY
- github.com/koxudaxi/datamodel-code-generator/releases/tag/0.63.0nvdRelease NotesWEB
News mentions
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