CVE-2026-55391Public exploitNetwork attack vector

Internal resource access via DNS rebinding

Published Jul 28, 2026 · Updated Jul 28, 2026

SSRF in datamodel-code-generator before 0.63.0 allows remote attackers to read internal HTTP resources through attacker-controlled URLs. The get_body function validates a hostname's IP once through _validate_url_for_fetch, but httpx resolves it again when connecting, so a rebinding record can replace the approved public address with a private one. Exploitation requires the tool or a CI service to process an attacker-influenced --url or remote $ref; the result can expose metadata credentials and internal service responses.

CVSS severity7.5
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

SSRF in datamodel-code-generator before 0.63.0 allows remote attackers to read internal HTTP resources through attacker-controlled URLs. The get_body function validates a hostname's IP once through _validate_url_for_fetch, but httpx resolves it again when connecting, so a rebinding record can replace the approved public address with a private one. Exploitation requires the tool or a CI service to process an attacker-influenced --url or remote $ref; the result can expose metadata credentials and internal service responses.

The record

CVE
CVE-2026-55391
Published
Jul 28, 2026
Updated
Jul 28, 2026
Vendor
koxudaxi
Product
datamodel-code-generator
Classifications
CWE-367, CWE-350, CWE-918, T1552.005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.63.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

koxudaxi · datamodel-code-generatorversion=< 0.63.0

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
CWE-350Reliance on Reverse DNS Resolution for a Security-Critical Action
CWE-918Server-Side Request Forgery (SSRF)
T1552.005Unsecured Credentials: Cloud Instance Metadata API

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo