CVE-2026-5026

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Source

https://cve.org/CVERecord?id=CVE-2026-5026

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5026.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-5026

Published

2026-03-27T14:50:36Z

Modified

2026-10-08T02:51:03Z

Severity

7.0 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator

Summary

Langflow - Stored XSS via Malicious SVG Upload

Details

The '/api/v1/files/images/{flow_id}/{file_name}' endpoint serves SVG files with the 'image/svg+xml' content type without sanitizing their content.

Since SVG files can contain embedded JavaScript, an attacker can upload a malicious SVG that executes arbitrary JavaScript when viewed by other users, leading to stored cross-site scripting (XSS). This allows stealing authentication tokens stored in cookies, including JWT access and refresh tokens.

Database specific

{
    "cna_assigner": "tenable",
    "cwe_ids": [
        "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5026.json"
}

References

Affected packages

Git / github.com/langflow-ai/langflow

Affected ranges

Type

GIT

Repo

https://github.com/langflow-ai/langflow

Events

Introduced

Last Affected

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "0"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

Other

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5026.json"