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CVE-2026-63184

Refitter: Unrestricted OpenAPI references permit build-host SSRF and file inclusion

CVSS score

7.1

EPSS probability

—

Risk score

0.7

Published

3 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

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Vulnerability description

DayBreach AI Explanation

Verified against sources

CVE-2026-63184: Refitter Unrestricted OpenAPI References Vulnerability

Sources read

2

Source agreement

Tam uyum

Evidence confidence

%63

Short explanation

Unrestricted OpenAPI references in the Refitter tool can lead to server-side request forgery (SSRF) and file disclosure on the developer or CI host.

Why does it matter?

This vulnerability allows attackers to include external or local file contents into generated outputs and expose sensitive data.

What should be done?

  • Follow vendor security advisories and recommendations
Chain of evidence and sources2 verified claims

Refitter aracı, 2.1.1 öncesi sürümlerde NJsonSchema'yı güvensiz varsayılanlarla çağırarak SSRF ve dosya sızıntısına neden olur.

S0 · daybreach-canonicalS1 · cvelistS2 · nvd

Güvenlik açığı, sunucu tarafı istek sahteciliği, uzak dosya ve yerel dosya dahil etme ile sonuçlanır.

S0 · daybreach-canonicalS1 · cvelistS2 · nvd
Show the technical text from the sources

Refitter is a tool for generating a C# REST API client using the Refit library. Prior to 2.1.1, the `refitter` dotnet tool invokes `NJsonSchema` with unsafe defaults for `$ref` resolution when generating Refit interfaces and contracts from attacker-controlled or attacker-influenced OpenAPI descriptions. Remote `http(s)` references cause requests from the developer or CI host and inline untrusted remote schema content into generated output. Absolute local file paths and relative `../` traversal outside the input directory also resolve and inline local content, permitting arbitrary local-file disclosure. The demonstrated chain stops at server-side request forgery, remote file inclusion, and local file inclusion, not code execution: Refit sets the base URL at runtime, enum values use verbatim-string doubling, and string defaults are escaped. This issue is fixed in version 2.1.1.

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

CWE: CWE-829, CWE-918

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-63184 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1christianhellerefitter View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
7.1CVSS V31HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:NNVD
7.1CVSS V3_1HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:NCVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-63184 is associated with the following CWEs:

CWE-829: Common Weakness Enumeration Entry CWE-829CWE-918: Server-Side Request Forgery (SSRF)

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-63184 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekiyor

Official Sources and Advisories

https://github.com/christianhelle/refitter/security/advisories/GHSA-x6w4-f264-3vvrvendor-advisoryhttps://github.com/christianhelle/refitter/pull/1173vendor-advisoryhttps://github.com/christianhelle/refitter/commit/6ad20a3803561225100b0a4bb6b12f947d23db7bvendor-advisoryhttps://github.com/christianhelle/refitter/releases/tag/2.1.1vendor-advisoryhttps://github.com/user-attachments/files/29395269/reproduce.shvendor-advisoryhttps://github.com/user-attachments/files/29395271/maintainer-report.txtvendor-advisoryhttps://github.com/user-attachments/files/29395272/advisory.mdvendor-advisoryhttps://github.com/user-attachments/files/29395283/reproduce.shvendor-advisoryhttps://github.com/user-attachments/files/29395284/maintainer-report.txtvendor-advisoryhttps://github.com/user-attachments/files/29395285/advisory.mdvendor-advisory

CVSS Vector Radar Chart

7.1 / 10
Attack VectorNetworkComplexityLowPrivilegesNoneUser Interact.RequiredConfidentialityLowIntegrityLowAvailabilityNone

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone required
User Interaction—
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)Low
Availability (Erişilebilirlik)None

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

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Weakness Type (CWE & CAPEC)

CWE-829 CWE-918

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CVE-2026-63184 · Refitter: Unrestricted OpenAPI references…