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CVE-2026-17631

Langflow OSS is affected by server-side request forgery due to missing URL validation in flow components

IBM Langflow OSS 1.0.0 through 1.10.2 could allow a remote authenticated attacker to obtain sensitive information due to a server-side request forgery (SSRF) vulnerability.

CVSS 3.1 · 5 Medium EPSS < 1% KEV · Not listed
Vendors
Apple Ibm Langflow and 2 more
Products
Macos Langflow Oss Langflow and 2 more
CVE-2026-19299

Langflow is vulnerable to arbitrary local file read due to path traversal in ChatInput, bundle FileInput, and GitExtractor components

IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote authenticated attacker to obtain sensitive information due to path traversal.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Apple Ibm Langflow and 2 more
Products
Macos Langflow Oss Langflow and 2 more
CVE-2026-19300

Langflow is vulnerable to information disclosure due to cross-user MCP tool cache collision and incomplete secret scrubbing on public flows

IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote attacker to obtain sensitive information due to incomplete scrubbing of sensitive credential fields.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Apple Ibm Langflow and 2 more
Products
Macos Langflow Oss Langflow and 2 more
CVE-2026-19301

Langflow is vulnerable to Server-Side Request Forgery due to missing or bypassable URL validation in multiple components

IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote authenticated attacker to obtain sensitive information due to server-side request forgery.

CVSS 3.1 · 5 Medium EPSS < 1% KEV · Not listed
Vendors
Apple Ibm Langflow and 2 more
Products
Macos Langflow Oss Langflow and 2 more
CVE-2026-19302

Langflow is vulnerable to arbitrary local file read due to path traversal in ChatInput, bundle FileInput, and GitExtractor components

IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote authenticated attacker to obtain sensitive information due to improper validation of symbolic links.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Apple Ibm Langflow and 2 more
Products
Macos Langflow Oss Langflow and 2 more
CVE-2026-19304

Langflow is vulnerable to Server-Side Request Forgery due to missing or bypassable URL validation in multiple components

IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote authenticated attacker to obtain sensitive information from internal services due to a URL parser discrepancy.

CVSS 3.1 · 7.7 High EPSS < 1% KEV · Not listed
Vendors
Apple Ibm Langflow and 2 more
Products
Macos Langflow Oss Langflow and 2 more
CVE-2026-19305

Langflow is vulnerable to Server-Side Request Forgery due to missing or bypassable URL validation in multiple components

IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote attacker to obtain sensitive information due to server-side request forgery.

CVSS 3.1 · 8.6 High EPSS < 1% KEV · Not listed
Vendors
Apple Ibm Langflow and 2 more
Products
Macos Langflow Oss Langflow and 2 more
CVE-2026-19306

Langflow is vulnerable to arbitrary local file read due to path traversal in ChatInput, bundle FileInput, and GitExtractor components

IBM Langflow OSS 1.0.0 through 1.11.2 allows an authenticated attacker to read arbitrary files from the server filesystem — including server secret material (secret_key, JWT signing keys, the application database, /proc/self/environ, and other tenants' upload directories) — by supplying absolute paths or traversal sequences in the files parameter of an authenticated build request. The file contents were embedded as text attachments in the language model prompt and transmitted to the configured model endpoint, resulting in confidential data exfiltration. This bypassed the LANGFLOW_RESTRICT_LOCAL_FILE_ACCESS=true containment boundary, which was enforced for other file-reading components but not for the Chat Input to Message attachment pipeline.

CVSS 3.1 · 7.7 High EPSS < 1% KEV · Not listed
Vendors
Apple Ibm Langflow and 2 more
Products
Macos Langflow Oss Langflow and 2 more
CVE-2026-8447

Langflow is vulnerable to stored cross-site scripting and IP spoofing due to unsanitized Markdown rendering and untrusted proxy header trust

IBM Langflow OSS 1.0.0 through 1.11.2 suffer from a stored cross-site scripting vulnerability in the Playground chat interface.

CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
Vendors
Apple Ibm Langflow and 2 more
Products
Macos Langflow Oss Langflow and 2 more
CVE-2026-9186

Langflow is vulnerable to stored cross-site scripting and IP spoofing due to unsanitized Markdown rendering and untrusted proxy header trust

IBM Langflow OSS 1.0.0 through 1.11.2 allows remote authenticated attackers to bypass localhost-only MCP configuration installation by spoofing X-Forwarded-For: 127.0.0.1 header, enabling arbitrary writes to IDE config files (~/.cursor/mcp.json, etc.).

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Apple Ibm Langflow and 2 more
Products
Macos Langflow Oss Langflow and 2 more
CVE-2026-18899

Langflow is affected by multiple authentication bypass, path traversal, authorization, and server-side request forgery vulnerabilities

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to read arbitrary files due to path traversal.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Ibm Langflow
Products
Langflow Oss Langflow
CVE-2026-18545

Langflow is affected by multiple authentication bypass, path traversal, authorization, and server-side request forgery vulnerabilities

IBM Langflow OSS 1.0.0 through 1.11.1 is vulnerable to server-side request forgery (SSRF). This may allow an authenticated attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating other attacks.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Ibm Langflow
Products
Langflow Oss Langflow
CVE-2026-18729

Langflow is affected by multiple remote code execution vulnerabilities due to insufficient code-execution policy enforcement

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote authenticated attacker to execute arbitrary code due to improper control of generation of code.

CVSS 3.1 · 8.8 High EPSS 1.6% KEV · Not listed
Vendors
Ibm Langflow
Products
Langflow Oss Langflow
CVE-2026-18891

Langflow is affected by multiple authentication bypass, path traversal, authorization, and server-side request forgery vulnerabilities

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to execute arbitrary flows and access sensitive information due to improper authentication.

CVSS 3.1 · 8.2 High EPSS < 1% KEV · Not listed
Vendors
Ibm Langflow
Products
Langflow Oss Langflow
CVE-2026-18904

Langflow is affected by multiple authentication bypass, path traversal, authorization, and server-side request forgery vulnerabilities

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to obtain sensitive information and inject unauthorized messages due to a namespace collision between user identifiers.

CVSS 3.1 · 8.2 High EPSS < 1% KEV · Not listed
Vendors
Ibm Langflow
Products
Langflow Oss Langflow
CVE-2026-19286

Langflow is affected by multiple remote code execution vulnerabilities due to insufficient code-execution policy enforcement

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to execute arbitrary code due to improper enforcement of security restrictions on the A2A public endpoint.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Vendors
Ibm Langflow
Products
Langflow Oss Langflow
CVE-2026-19294

Langflow is affected by multiple authentication bypass, path traversal, authorization, and server-side request forgery vulnerabilities

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote authenticated attacker to execute and read any user's private flow due to improper authorization.

CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed
Vendors
Ibm Langflow
Products
Langflow Oss Langflow
CVE-2026-19295

Langflow is affected by multiple remote code execution vulnerabilities due to insufficient code-execution policy enforcement

IBM Langflow OSS 1.0.0 through 1.11.1 allows an authenticated attacker to execute arbitrary operating system commands in the server process by saving a flow with a crafted type field value and triggering a build of a wrapper flow that references it. This allowed privilege escalation from "authenticated flow user" to arbitrary OS-level command execution under the server process identity, bypassing the LANGFLOW_ALLOW_CUSTOM_COMPONENTS=false policy control.

CVSS 3.1 · 9.9 Critical EPSS 1.6% KEV · Not listed
Vendors
Ibm Langflow
Products
Langflow Oss Langflow
CVE-2026-19875

Unauthenticated Registration POST Endpoint Permits Admin Email Overwrite and Outbound Relay Abuse in Langflow

IBM Langflow OSS 1.0.0 through 1.10.0 could allow a remote attacker to overwrite administrator email information and abuse the server as an outbound relay due to missing authentication for the registration endpoint.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Apple Ibm Langflow and 2 more
Products
Macos Langflow Langflow Oss and 3 more
CVE-2026-19297

Insufficient Authentication Brute Force Protection on Login Endpoint

IBM Langflow OSS 1.0.0 through 1.9.6 could allow a remote attacker to obtain unauthorized access to user accounts due to improper restriction of excessive authentication attempts.

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
Vendors
Apple Ibm Langflow and 2 more
Products
Macos Langflow Oss Langflow and 2 more