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IBM Langflow OSS CVE-2026-12766

| EUVDEUVD-2026-78084 MEDIUM
Server-Side Request Forgery (SSRF) (CWE-918)
2026-09-14 ibm GHSA-w3gg-r3w4-786c
5.4
CVSS 3.1 · Vendor: ibm
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Severity by source

Vendor (ibm) PRIMARY
5.4 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
vuln.today AI
5.4 MEDIUM

Network-reachable SSRF gated behind authenticated access (PR:L); limited indirect confidentiality and integrity impact, no availability consequence, no scope change.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (ibm).

CVSS VectorVendor: ibm

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

1
Analysis Generated
Sep 15, 2026 - 08:10 vuln.today

DescriptionCVE.org

IBM Langflow OSS 1.0.0 through 1.11.2 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.

AnalysisAI

Server-side request forgery in IBM Langflow OSS versions 1.0.0 through 1.11.2 allows authenticated network attackers to induce the server to issue unauthorized HTTP requests to arbitrary destinations, enabling internal network enumeration or use of the server as a proxy to reach otherwise-isolated services. The vulnerability is classified as CWE-918 and is confirmed by IBM with a patch available at the vendor support page. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires a valid authenticated user account on the Langflow OSS instance (PR:L per CVSS). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 5.4 Medium score accurately reflects a constrained but real exposure: network-reachable, low complexity, but gated behind authenticated access (PR:L), which meaningfully limits the attacker population to registered or compromised users. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Vendor-released patch is available per IBM's advisory at https://www.ibm.com/support/pages/node/7285639; administrators should consult that page for the exact fixed version and apply the upgrade immediately. … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-9198 CRITICAL POC
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Unauthenticated remote code execution in IBM Langflow OSS versions 1.0.0 through 1.10.0 lets any network-reachable attac

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Remote code execution in IBM Langflow OSS 1.0.0 through 1.11.1 allows a network-accessible authenticated attacker with l

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Authenticated remote code execution in IBM Langflow OSS 1.0.0 through 1.10.0 lets any logged-in user run arbitrary Pytho

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Arbitrary file write in IBM Langflow OSS 1.0.0 through 1.10.0 lets an attacker who controls an external HTTP server plan

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Remote code injection in IBM Langflow OSS versions 1.0.0 through 1.10.0 allows an authenticated remote attacker to execu

CVE-2026-13435 CRITICAL
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Remote code execution in IBM Langflow OSS 1.0.0 through 1.10.1 stems from improper input validation in the PythonREPL sa

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Privilege escalation to remote code execution in IBM Langflow OSS 1.0.0 through 1.10.0 allows an authenticated user to e

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Code injection in IBM Langflow OSS versions 1.0.0 through 1.10.0 lets an authenticated user execute arbitrary operating-

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CVE-2026-12766 vulnerability details – vuln.today

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