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IBM disclosed multiple severe vulnerabilities in Langflow OSS affecting versions 1.0.0 through 1.10.1, including remote code execution, denial of service, path traversal, unauthorized file and vector store access, build job information disclosure, and exposed credentials through unauthenticated or insufficiently authorized API endpoints. The most prominent issue, CVE-2026-13446, is a hard-coded credentials flaw classified as CWE-798 and scored CVSS 9.8, creating a network-exploitable path to compromise confidentiality, integrity, and availability.
According to IBM's bulletin, the vulnerable endpoints could let attackers execute code, read arbitrary files, access secrets, modify other users' data, and cancel active builds without proper authorization. IBM advised users to upgrade Langflow OSS to 1.10.2 to remediate the issues, as the affected releases expose both application internals and connected external components to critical compromise.
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The CVE record for CVE-2026-13446 notes that the update was received by psirt@us.ibm.com. The issue covers a hard-coded credentials vulnerability in IBM Langflow OSS with severe potential impact.
IBM published a security bulletin describing multiple severe vulnerabilities in Langflow OSS, including CVE-2026-13446, affecting versions 1.0.0 through 1.10.1. The bulletin recommends upgrading to version 1.10.2 and details risks including remote code execution, denial of service, path traversal, exposed credentials, and unauthorized access to files, secrets, and build data.
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IBM disclosed five high-severity vulnerabilities in **Langflow OSS** affecting versions `1.0.0` through `1.10.0`, including multiple paths to **remote code execution**, privilege escalation, and arbitrary file write. The issues are tracked as `CVE-2026-9135`, `CVE-2026-8476`, `CVE-2026-8481`, `CVE-2026-8635`, and `CVE-2026-8859`. Reported weaknesses include code injection through unvalidated dynamic `CodeInput` fields in the Policies component, unsafe `pickle.loads()` deserialization in the disk cache, direct execution of user-supplied Python in the `/api/v1/validate/code` endpoint, database manipulation that can elevate an authenticated user to superuser, and path traversal in the APIRequest component's **Save to File** feature via crafted `Content-Disposition` filenames. Several of the flaws require only authenticated access and can lead to arbitrary Python or system command execution with the privileges of the Langflow server process, creating a path to full host compromise in some deployments. IBM released **Langflow OSS `1.10.1`** to address all five vulnerabilities and advised organizations to upgrade immediately; additional mitigation guidance includes reviewing file-system permissions and sanitizing or removing cached data where possible. Public reporting said no active exploitation had been confirmed at publication time.
Jul 19, 2026
IBM disclosed **CVE-2026-10561**, a critical unauthenticated remote code execution flaw in Langflow OSS affecting versions `1.0.0` through `1.9.3`. The vulnerability is rooted in improper isolation in the `PythonREPLComponent`: CPython's `exec()` restores full builtins access when the globals dictionary does not explicitly clear `__builtins__`, allowing attackers to bypass the intended import restrictions. IBM and downstream advisories rate the issue **CVSS 3.1 10.0**, noting it is remotely exploitable with low attack complexity, requires no privileges, and needs no user interaction. The flaw can be chained with Langflow's default `LANGFLOW_AUTO_LOGIN=true` behavior, which exposes the `/api/v1/auto_login` endpoint and can issue a superuser JWT without credentials, enabling unauthenticated code execution on the host. Successful exploitation could lead to arbitrary OS command execution, theft of LLM provider keys, flow definitions and vector store credentials, and persistent compromise of affected systems. IBM recommends upgrading to **Langflow OSS 1.9.4** immediately; no workaround was listed, and defenders are advised to apply vendor updates, harden access controls, and monitor for unauthorized activity.
Jul 12, 2026
Threat actors rapidly exploited **CVE-2026-33017**, a critical unauthenticated remote code execution flaw in Langflow’s public flow build endpoint, allowing arbitrary Python code to reach an unsandboxed `exec()` path with a single crafted request. The bug affects Langflow versions prior to **1.9.0** and stems from the `POST /api/v1/build_public_tmp/{flow_id}/flow` endpoint accepting attacker-controlled flow data through an optional parameter. Researchers and vendor advisories said the issue is distinct from **CVE-2025-3248** because the vulnerable endpoint is intentionally public, meaning the fix required removing attacker-supplied flow data from that execution path rather than simply adding authentication. Sysdig and other researchers reported exploitation beginning within about **20 hours** of disclosure, with attackers scanning for exposed instances, validating code execution, reading files such as `.env`, `.db`, and `/etc/passwd`, stealing credentials, API keys, and database secrets, and attempting follow-on payload delivery from infrastructure including `173.212.205[.]251:8443`. The severity prompted **CISA** to add the flaw to its **Known Exploited Vulnerabilities** catalog and order federal agencies to remediate by **April 8, 2026** or discontinue use if they could not secure affected systems. Security guidance across the reports urged organizations to upgrade to **Langflow 1.9.0 or later**, restrict or remove internet exposure of the vulnerable endpoint, monitor outbound connections, and rotate secrets if compromise is suspected.
Jul 2, 2026