Medium severity · published Apr 30, 2026
CVE-2026-3346
Stored Cross-Site Scripting (XSS) in Langflow Markdown Rendering via rehypeRaw
6.4
CVSS
0.2%
EPSS
No
On KEV
Description
IBM Langflow Desktop 1.6.0 through 1.8.4 Lanflow is vulnerable to stored cross-site scripting. This vulnerability allows an authenticated user to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LD
Langflow Desktop · IBM
1.6.0 through 1.8.4 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3346
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3346
Vendor Advisory
https://www.ibm.com/support/pages/node/7271095
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