CVE-2026-55391— datamodel-code-generator vulnerable to SSRF protection bypass via DNS rebinding
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| koxudaxi | datamodel-code-generator | < 0.63.0 | affected |
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I. Basic Information for CVE-2026-55391
Vulnerability Information
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Vulnerability Title
datamodel-code-generator vulnerable to SSRF protection bypass via DNS rebinding
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不恰当地信任反向DNS
Source: CVE Program / CVE List V5
Vulnerability Title
Koudai Aono datamodel-code-generator 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Koudai Aono datamodel-code-generator是日本Koudai Aono个人开发者的一款数据模型代码生成器。 Koudai Aono datamodel-code-generator 0.63.0之前版本存在安全漏洞，该漏洞源于对URL主机验证不充分，允许DNS重新绑定绕过私有网络限制访问内部服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| koxudaxi | datamodel-code-generator | < 0.63.0 | - |
II. Public POCs for CVE-2026-55391
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 9350 chars
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III. Intelligence Information for CVE-2026-55391
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Vendor Advisories for CVE-2026-55391 (1)
Vendor Pages for CVE-2026-55391 (1)
- 🔗 Release 0.63.0 · koxudaxi/datamodel-code-generator · GitHubx_refsource_MISC
Same Patch Batch · koxudaxi · 2026-07-28 · 12 CVEs total
| CVE-2026-54653 | 8.8 HIGH | `datamodel-code-generator` vulnerable to code injection in via attacker-controlled `defaul |
| CVE-2026-54691 | 8.2 HIGH | datamodel-code-generator vulnerable to SSRF via --url: no host/IP validation, follows redi |
| CVE-2026-54690 | 8.2 HIGH | datamodel-code-generator vulnerable to SSRF via JSON-Schema `$ref` to HTTP URL (silent by |
| CVE-2026-54654 | 7.8 HIGH | `datamodel-code-generator` vulnerable to code injection via unescaped carriage return in ` |
| CVE-2026-54621 | 7.8 HIGH | `datamodel-code-generator` vulnerable to code injection via unescaped carriage return in G |
| CVE-2026-54655 | 7.8 HIGH | `datamodel-code-generator` vulnerable to code execution on import via `x-python-type` JSON |
| CVE-2026-54656 | 7.8 HIGH | `datamodel-code-generator` vulnerable to code execution on import via unescaped `validator |
| CVE-2026-55390 | 7.5 HIGH | Arbitrary local file read via XSD `schemaLocation` (`xs:include`/`xs:import`) path travers |
| CVE-2026-55389 | 7.5 HIGH | datamodel-code-generator vulnerable to arbitrary local file read via JSON-Schema `$ref` (` |
| CVE-2026-55415 | 7.5 HIGH | datamodel-code-generator vulnerable to code injection via `x-python-import` / `customTypeP |
| CVE-2026-55403 | 3.7 LOW | datamodel-code-generator: Authorization / request headers leaked to cross-origin redirect |
IV. Related Vulnerabilities
Same product: datamodel-code-generator
- CVE-2026-55389
datamodel-code-generator vulnerable to arbitrary local file - CVE-2026-54653
`datamodel-code-generator` vulnerable to code injection in v - CVE-2026-54656
`datamodel-code-generator` vulnerable to code execution on i - CVE-2026-54690
datamodel-code-generator vulnerable to SSRF via JSON-Schema - CVE-2026-55415
datamodel-code-generator vulnerable to code injection via `x
Same vendor: koxudaxi
- CVE-2026-55389
datamodel-code-generator vulnerable to arbitrary local file - CVE-2026-54653
`datamodel-code-generator` vulnerable to code injection in v - CVE-2026-54656
`datamodel-code-generator` vulnerable to code execution on i - CVE-2026-54690
datamodel-code-generator vulnerable to SSRF via JSON-Schema - CVE-2026-55415
datamodel-code-generator vulnerable to code injection via `x
Same weakness: CWE-350
- CVE-2026-12635
Reliance on Reverse DNS Resolution for a Security-Critical A - CVE-2026-6874
ericc-ch copilot-api Header token dns rebinding - CVE-2026-24281
Apache ZooKeeper: Reverse-DNS fallback enables hostname veri - CVE-2026-28271
Kiteworks Core is vulnerable to Server-Side Request Forgery - CVE-2026-1490
Spam protection, Honeypot, Anti-Spam by CleanTalk <= 6.71 -
V. Comments for CVE-2026-55391
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