CVE•Published 2026-07-28•Modified 2026-08-06•0 articles on news•5 live references•NVD data

CVE-2026-55391Koxudaxi · Datamodel-code-generator

Vulnerability data via NVD (ingested)

CVSS v3.1

7.5

HIGH

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

EPSS percentile

Exploit Prediction Scoring System · top 90% of all CVEs

Weaknesses (CWE)

CWE-350Reliance on Reverse DNS Resolution for a Security-Critical Action CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition CWE-918Server-Side Request Forgery (SSRF)

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.

Timeline

Published 2026-07-28

Modified 2026-08-06

External references

NVD MITRE Exploit-DB GitHub PoC VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-55391

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Koxudaxi Datamodel-code-generator"

All exposed Koxudaxi Datamodel-code-generator instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Datamodel-code-generator"

HTTP body or banner mentions "Datamodel-code-generator" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-55391