High 7.5Published Jul 28, 2026

CVE-2026-55391datamodel-code-generator vulnerable to SSRF protection bypass via DNS rebinding

Updated under an hour ago (Oct 28, 2026, 2:30 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for koxudaxi datamodel-code-generator

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N
Weakness (CWE): CWE-350, CWE-367, CWE-918
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jul 29, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

koxudaxi datamodel-code-generator koxudaxi:datamodel_code_generator (from the name)	before 0.63.0	CNA record
koxudaxi datamodel-code-generator koxudaxi:datamodel-code-generator	before 0.63.0	NVD

References

References

https://github.com/koxudaxi/datamodel-code-generator/security/advisories/GHSA-vx7x-vcc2-c44g	x-refsource-confirm, exploit, vendor-advisory
https://github.com/koxudaxi/datamodel-code-generator/commit/25c8b7e497419eb20b230fa3318c04f9bebc5a6f	x-refsource-misc, patch
https://github.com/koxudaxi/datamodel-code-generator/releases/tag/0.63.0	x-refsource-misc, release-notes
https://gist.github.com/thegr1ffyn/c1d54dd6ff2a4c0d7d0dabe00c4985f4	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.