PT-2026-53946

Name of the Vulnerable Software and Affected Versions IBM Langflow OSS versions 1.0.0 through 1.9.6 Description Improper authorization enforcement in the Streamable MCP transport endpoint allows unauthenticated attackers to access protected MCP project resources and execute MCP operations...

PT-2026-53947

Name of the Vulnerable Software and Affected Versions IBM Langflow OSS versions 1.0.0 through 1.10.0 Description Improper validation of flow nodes that have missing or empty component type fields can lead to arbitrary code execution. Arbitrary code execution occurs when an attacker can run...

PT-2026-53957

Name of the Vulnerable Software and Affected Versions IBM Langflow OSS versions 1.0.0 through 1.10.0 Description The voice mode contains improper shared-state handling, which allows API clients to be reused across tenant boundaries. An authenticated attacker can manipulate the cache state, causin...

PT-2026-53955

Name of the Vulnerable Software and Affected Versions IBM Langflow OSS versions 1.0.0 through 1.9.3 Description The API Request component contains a Server-Side Request Forgery SSRF protection bypass. An authenticated attacker with flow author privileges can bypass security controls by enabling t...

PT-2026-53949

Name of the Vulnerable Software and Affected Versions IBM Langflow OSS versions 1.0.0 through 1.10.0 Description Authenticated attackers can execute arbitrary OS commands and read sensitive files, including credentials. This can lead to complete system compromise and lateral movement within the...

PT-2026-53950

Name of the Vulnerable Software and Affected Versions IBM Langflow OSS versions 1.0.0 through 1.10.0 Description Langflow uses a weak and reversible key derivation mechanism for encryption at rest, which could lead to the disclosure of all stored credentials. Recommendations At the moment, there ...

PT-2026-53958

Name of the Vulnerable Software and Affected Versions IBM Langflow OSS versions 1.0.0 through 1.9.6 Description A missing authentication flaw exists in the /api/v1/build public tmp/ endpoints. This allows an unauthenticated attacker to use a valid job identifier to read build event data or cancel...

Security Bulletin: Weak Cryptographic Key Derivation Exposed All Stored Credentials

Summary A critical vulnerability in the credential encryption system allowed attackers to decrypt all stored API keys, database passwords, and OAuth tokens. The system used Python's non-cryptographic Mersenne Twister PRNG seeded with the SECRETKEY to derive Fernet encryption keys for credentials...

Security Bulletin: Flow Validation Bypass via Empty Component Type Field

Summary A vulnerability in flow validation logic allowed attackers to bypass custom component restrictions by submitting flow nodes with empty or missing type fields. When custom components were disabled, the validator silently skipped nodes lacking a type value instead of blocking them, enabling...

Security Bulletin: Insecure Deserialization in Redis Cache Backend

Summary A deserialization vulnerability was identified in the Redis cache service that could allow attackers with network access to the Redis instance to execute arbitrary code. The cache service used dill.loads to deserialize cached values without integrity verification, enabling attackers to...

PYSEC-2026-378 Langflow: BaseFileComponent-based nodes arbitrary file read with RCE exploit

Summary All components based on BaseFileComponent are vulnerable to the following vulnerability: 1. Docling DoclingInlineComponent 2. Docling Serve DoclingRemoteComponent 3. Read File FileComponent 4. NVIDIA Retriever Extraction NvidiaIngestComponent 5. Video File VideoFileComponent 6. Unstructur...

PYSEC-2026-376 Langflow has Remote Code Execution in CSV Agent

Summary The CSV Agent node in Langflow hardcodes allowdangerouscode=True, which automatically exposes LangChain’s Python REPL tool pythonreplast. As a result, an attacker can execute arbitrary Python and OS commands on the server via prompt injection, leading to full Remote Code Execution RCE...

PYSEC-2026-379 Unauthenticated Remote Code Execution in Langflow via Public Flow Build Endpoint

Summary The POST /api/v1/buildpublictmp/flowid/flow endpoint allows building public flows without requiring authentication. When the optional data parameter is supplied, the endpoint uses attacker-controlled flow data containing arbitrary Python code in node definitions instead of the stored flow...

Langflow Unauth RCE

Langflow versions prior to 1.3.0 are susceptible to code injection in the /api/v1/validate/code endpoint. A remote and unauthenticated attacker can send crafted HTTP requests to execute arbitrary code...

PYSEC-2026-380 Langflow Unauth RCE

Langflow versions prior to 1.3.0 are susceptible to code injection in the /api/v1/validate/code endpoint. A remote and unauthenticated attacker can send crafted HTTP requests to execute arbitrary code...

PT-2026-53466

Langflow versions prior to 1.3.0 are susceptible to code injection in the /api/v1/validate/code endpoint. A remote and unauthenticated attacker can send crafted HTTP requests to execute arbitrary code...

VulnCheck KEV: CVE-2026-55255

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.1, an Insecure Direct Object Reference IDOR vulnerability in /api/v1/responses endpoint allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in...

Security Bulletin: SSRF Vulnerability in Langflow OSS Legacy Components Bypasses Protection

Summary Langflow OSS versions = 1.9.3 contain SSRF vulnerability in legacy RSS Reader and SearXNG components that bypass SSRF protection introduced in v1.9.3. RSSReaderComponent calls requests.getself.rssurl directly on user input without validateurlforssrf check, completely bypassing protection...

VulnCheck KEV: CVE-2026-0769

Langflow evalcustomcomponentcode Eval Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Langflow. Authentication is not required to exploit this vulnerability. The specific flaw exists within the...

CVE-2026-55423

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.7.0, the logout button does not clear the session. The previous user stays logged in unless another user explicitly logs in. This vulnerability is fixed in 1.7.0...