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CVE-2026-55391

Koxudaxi Datamodel-code-generator server-side request forgery (SSRF)

7.5 HIGHPublic exploitEPSS 0.30%
  1. Published28 Jul 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N

Affected products

Koxudaxi Datamodel-code-generator< 0.63.0

Remediation

Fixed in
Koxudaxi Datamodel-code-generator≥ 0.63.0

References

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Frequently asked

Is CVE-2026-55391 being actively exploited?

CVE-2026-55391 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.30%.

How severe is CVE-2026-55391?

CVE-2026-55391 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.30% probability of exploitation.

Which products are affected by CVE-2026-55391?

Affected products include Koxudaxi Datamodel-code-generator.

How do I fix CVE-2026-55391?

Upgrade affected software to a fixed version, for example Koxudaxi Datamodel-code-generator 0.63.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-55391 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.