---
title: "CVE-2026-63184: Refitter - Server Side Request Forgery & File Inclusion"
description: "Refitter prior to 2.1.1 contains a server-side request forgery and file inclusion vulnerability caused by unsafe $ref resolution in NJsonSchema when processing attacker-controlled OpenAPI descriptions, letting remote attackers cause SSRF and local file disclosure, exploit requires attacker-controlled OpenAPI input."
url: https://panop.io/threat-heartbeat/CVE-2026-63184/
---

# CVE-2026-63184 Refitter - Server Side Request Forgery & File Inclusion

Refitter prior to 2.1.1 contains a server-side request forgery and file inclusion vulnerability caused by unsafe $ref resolution in NJsonSchema when processing attacker-controlled OpenAPI descriptions, letting remote attackers cause SSRF and local file disclosure, exploit requires attacker-controlled OpenAPI input.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.41% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-63184)

## Details

Type

Server Side Request Forgery

Impact

Server Side Request Forgery, File System Read

CVSS vector

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

Published

30 October 2026

Updated

1 November 2026

Weakness

[CWE-829](https://cwe.mitre.org/data/definitions/829.html)

## Vendor fix

Update to version 2.1.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-63184](https://nvd.nist.gov/vuln/detail/CVE-2026-63184)
- [https://github.com/user-attachments/files/29395272/advisory.md](https://github.com/user-attachments/files/29395272/advisory.md)
- [https://github.com/user-attachments/files/29395284/maintainer-report.txt](https://github.com/user-attachments/files/29395284/maintainer-report.txt)
- [https://github.com/user-attachments/files/29395286/listener.py](https://github.com/user-attachments/files/29395286/listener.py)
- [https://github.com/christianhelle/refitter/releases/tag/2.1.1](https://github.com/christianhelle/refitter/releases/tag/2.1.1)
- [https://github.com/user-attachments/files/29395283/reproduce.sh](https://github.com/user-attachments/files/29395283/reproduce.sh)
- [https://github.com/user-attachments/files/29395285/advisory.md](https://github.com/user-attachments/files/29395285/advisory.md)
- [https://github.com/user-attachments/files/29395288/make\_spec.py](https://github.com/user-attachments/files/29395288/make_spec.py)
- [https://github.com/christianhelle/refitter/commit/6ad20a3803561225100b0a4bb6b12f947d23db7b](https://github.com/christianhelle/refitter/commit/6ad20a3803561225100b0a4bb6b12f947d23db7b)
- [https://github.com/christianhelle/refitter/pull/1173](https://github.com/christianhelle/refitter/pull/1173)
- [https://github.com/christianhelle/refitter/security/advisories/GHSA-x6w4-f264-3vvr](https://github.com/christianhelle/refitter/security/advisories/GHSA-x6w4-f264-3vvr)
- [https://github.com/user-attachments/files/29395269/reproduce.sh](https://github.com/user-attachments/files/29395269/reproduce.sh)
- [https://github.com/user-attachments/files/29395271/maintainer-report.txt](https://github.com/user-attachments/files/29395271/maintainer-report.txt)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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