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CVE-2026-107366— Langflow OSS Authorization Bypass Through User-Controlled Key

Quick assessment

Affected
IBM Langflow OSS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

IBM Langflow OSS 1.0.0 至 1.12.4 版本中存在三个消息端点未执行所有权验证。任何已认证的用户均可批量删除其他用户的消息、覆盖消息内容以注入恶意提示，或通过重新分配会话 ID 来劫持整个对话会话。

CVSS 8.3 · High
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I. Basic Information for CVE-2026-107366

Vulnerability Information
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Vulnerability Title
Langflow OSS Authorization Bypass Through User-Controlled Key
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
IBM Langflow OSS 1.0.0 ~ 1.12.4 cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-107366

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III. Intelligence Information for CVE-2026-107366

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Vendor Advisories for CVE-2026-107366 (1)

Same Patch Batch · IBM · 2026-10-19 · 38 CVEs total

CVE-2026-107400 8.8 HIGH Security Vulnerability identified in IBM TRIRIGA - GWT Mock Authentication
CVE-2026-109126 8.8 HIGH IBM Verify Identity Access and IBM Security Verify Access Hard-coded Credentials
CVE-2026-10743 8.8 HIGH IBM MQ Race Condition
CVE-2026-10574 8.8 HIGH IBM MQ Buffer Overflow
CVE-2026-10572 8.8 HIGH IBM MQ Buffer Overflow
CVE-2026-105453 8.4 HIGH IBM Sterling Connect:Direct for Unix Improper Privilege Management
CVE-2026-12665 8.1 HIGH IBM MQ Buffer Overflow
CVE-2026-6719 7.5 HIGH IBM Concert Software Use of Insufficiently Random Values
CVE-2026-12148 7.5 HIGH IBM MQ Deserialization of Untrusted Data
CVE-2026-3295 7.4 HIGH IBM Cloud Pak System Cross-Site Scripting
CVE-2026-19178 6.8 MEDIUM TS4500 Tape Library Race Condition
CVE-2026-12350 6.5 MEDIUM IBM MQ Deserialization of Untrusted Data
CVE-2026-12343 6.5 MEDIUM IBM MQ Denial of Service
CVE-2026-12155 6.5 MEDIUM IBM MQ Deserialization of Untrusted Data
CVE-2025-36061 6.5 MEDIUM TS4500 Tape Library Denial of Service
CVE-2026-11829 6.5 MEDIUM IBM MQ Buffer Overflow
CVE-2026-14511 6.5 MEDIUM IBM MQ Denial of Service
CVE-2025-36252 6.3 MEDIUM TS4500 Tape Library Insufficient Session Expiration
CVE-2023-38375 6.1 MEDIUM IBM Cloud Pak System Cross-Site Scripting
CVE-2026-4413 6.1 MEDIUM IBM Concert Software Cross-Site Scripting

Showing top 20 of 38 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Langflow OSS
Same vendor: IBM
Same weakness: CWE-639

V. Comments for CVE-2026-107366

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