Vulnerability · Published Apr 30, 2026 · Assigned by ibm

CVE-2026-3346Stored Cross-Site Scripting (XSS) in Langflow Markdown Rendering via rehypeRaw

Medium 6.4

In plain English

A medium-severity SQL injection in Langflow Desktop from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities).

Severity (CVSS 3.1)6.4Medium

Exploit odds (30 days)0.2%top 95.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
IBM	Langflow Desktop	1.6.0 – through 1.8.4

Weakness: CWE-89 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

References

https://www.ibm.com/support/pages/node/7271095 vendor-advisory, patch