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CVE-2026-111641Suited to automated attack · CISA

FastapiAdmin through 3.0 Authentication Bypass via Auto-Login Endpoints

CVSS score

9.3

EPSS probability

%0.4

Risk score

0.0

Published

2 d ago

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

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Vulnerability description

CVE AI research

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DayBreach AI Explanation

Verified against sources

FastapiAdmin Authentication Bypass Vulnerability via Auto-Login Endpoints

Sources read

2

Source agreement

0/2

Evidence confidence

%44

Short explanation

FastapiAdmin through version 3.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to abuse unprotected auto-login endpoints and obtain sessions for any user.

Why does it matter?

This vulnerability enables attackers to list users, mint a superuser auto-login token, and exchange it for a JWT session to achieve full administrative control.

What should be done?

  • Follow official vendor advisories
  • Restrict access to auto-login endpoints
  • Review authentication mechanisms
Note on uncertainty

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Chain of evidence and sources2 verified claims

FastapiAdmin 3.0 ve önceki sürümler, kimliği doğrulanmamış saldırganların otomatik giriş uç noktalarını kötüye kullanmasına izin veren bir kimlik doğrulama atlatma açığı içerir.

S0 · daybreach-canonicalS1 · cvelistS2 · nvd

Saldırganlar /api/v1/auth/auto-login/users üzerinden kullanıcıları listeleyebilir, süper kullanıcı otomatik giriş tokeni üretebilir ve JWT oturumuyla takas edebilir.

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

FastapiAdmin through 3.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to obtain sessions for any user by abusing unprotected auto-login endpoints. Attackers can list users via /api/v1/auth/auto-login/users, mint a superuser auto-login token, and exchange it for a JWT session to gain full administrative control.

CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CWE: CWE-306

Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-111641 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1fastapiadminFastapiAdmin 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
9.8CVSS V3_1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE CNA
9.8CVSS V31CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HNVD
9.3CVSS V4_0CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NCVE CNA
9.3CVSS V40CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XNVD

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-2026-111641 is associated with the following CWEs:

CWE-306: Common Weakness Enumeration Entry CWE-306

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-2026-111641 weaknesses.

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

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekmiyor

Official Sources and Advisories

https://hackmd.io/@hieuPenguinnn/fastapiadmin-unauthenticated-autologin-and-hardcoded-jwt-secretvendor-advisoryhttps://github.com/fastapiadmin/FastapiAdmin/blob/v3.0/backend/app/api/v1/module_system/auth/controller.py#L173-L251vendor-advisoryVulnCheck Advisory: FastapiAdmin through 3.0 Authentication Bypass via Auto-Login Endpointsvendor-advisory

CVSS Vector Radar Chart

9.3 / 10
Attack VectorNetworkComplexityLowPrivilegesNoneUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone required
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

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

Follow the vendor

F
fastapiadmin logo
fastapiadmin

Weakness Type (CWE & CAPEC)

CWE-306

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