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CVE-2026-107366

Langflow OSS Authorization Bypass Through User-Controlled Key

CVSS score

8.3

EPSS probability

—

Risk score

0.8

Published

7 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

Impact on My Inventory

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Vulnerability description

CVE AI research

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DayBreach AI Explanation

Verified against sources

IBM Langflow OSS Authorization Bypass Vulnerability in CVE-2026-107366

Sources read

1

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

IBM Langflow OSS versions 1.0.0 through 1.12.4 contain an authorization bypass vulnerability due to a user-controlled key. Since message endpoints perform no ownership verification, authenticated users can delete other users' messages, overwrite content, or hijack conversation sessions by reassigning session IDs.

Why does it matter?

This vulnerability allows authenticated attackers to access sensitive message data, manipulate message content, and take over conversation sessions. It carries a high severity score based on CVSS metrics.

What should be done?

  • Review the provided patch references
  • Follow vendor advisory documentation to apply updates
  • Check the software version and deploy appropriate fixes
Chain of evidence and sources3 verified claims

IBM Langflow OSS 1.0.0 ile 1.12.4 sürümleri arasında sahiplik doğrulaması yapmayan üç mesaj uç noktası bulunmaktadır.

S0 · daybreach-canonicalS1 · cvelist

Kimliği doğrulanmış herhangi bir kullanıcı başka bir kullanıcının mesajlarını silebilir veya oturum kimliğini yeniden atayabilir.

S0 · daybreach-canonicalS1 · cvelist

Zafiyet için mevcut yama durumu doğrulanmış yama referanslarıyla desteklenmektedir.

S0 · daybreach-canonical
Show the technical text from the sources

IBM Langflow OSS 1.0.0 through 1.12.4 contains three message endpoints that perform no ownership verification. Any authenticated user can bulk-delete another user's messages, overwrite message content to inject malicious prompts, or hijack an entire conversation session by reassigning its session ID.

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

CWE: CWE-639

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-2026-107366 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1ibmLangflow OSS 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
8.3CVSS V31HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:LNVD
8.3CVSS V3_1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:LCVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

2 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

cvelist

CNA çözüm referansı

Open source
reference

Yama veya çözüm referansı

Open source
Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Apply the official update named in the evidence only to the matching product and version.
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-2026-107366 is associated with the following CWEs:

CWE-639: Common Weakness Enumeration Entry CWE-639

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-2026-107366 weaknesses.

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

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsLow
UserGerekmiyor

Official Sources and Advisories

https://www.ibm.com/support/pages/node/7293016patch

CVSS Vector Radar Chart

8.3 / 10
Attack VectorNetworkComplexityLowPrivilegesLowUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityLow

Vulnerability Scoring Details

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

Yama doğrulandı

2 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

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Weakness Type (CWE & CAPEC)

CWE-639

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CVE-2026-107366 · Langflow OSS Authorization Bypass Through…