EUVD-2026-71216
GHSA-342j-xgq4-rg29
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Stored XSS via public unauthenticated chat input (PR:N, UI:R required for victim); scope change (S:C) reflects browser-context crossing; no availability impact.
Primary rating from Vendor (ibm).
CVSS VectorNVD
Lifecycle Timeline
1DescriptionNVD
IBM Langflow OSS 1.0.0 through 1.11.2 suffer from a stored cross-site scripting vulnerability in the Playground chat interface.
AnalysisAI
Stored cross-site scripting in IBM Langflow OSS 1.0.0-1.11.2 allows an unauthenticated network attacker to inject persistent malicious scripts into the Playground chat interface. When a victim user subsequently loads the chat view, the stored payload executes in their browser under the application's origin, enabling session hijacking, credential theft, or unauthorized UI manipulation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker requires network access to the Langflow OSS Playground chat interface; per PR:N in the CVSS vector, no authentication credentials are needed to submit the malicious payload. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 6.1 Medium score reflects real but bounded impact: confidentiality and integrity are both rated Low, availability is unaffected. … 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 | Apply the vendor-released patch per IBM advisory https://www.ibm.com/support/pages/node/7285646 (exact patched version number is not specified in available data - consult the advisory directly for the target version). … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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