CVE-2026-8447CWE-79cross-site-scripting

CVE-2026-8447

Medium · published September 4, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
21.5
In the wild
Unconfirmed
What it is

IBM Langflow OSS 1.0.0 through 1.11.2 suffer from a stored cross-site scripting vulnerability in the Playground chat interface.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00299 · 21.5th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-04T19:17Z
Affected products (1)
ProductVersionsFixed in
langflow/langflow≥ 1.0.0, < 1.11.31.11.3
References (1)
https://www.ibm.com/support/pages/node/7285646 · [email protected]
EPSS history
Timeline
  • 06 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 04 SEP 14:27Z
    Langflow is vulnerable to stored cross-site scripting and IP spoofing due to unsanitized Markdown rendering and untrusted proxy header trust
    cvelistv5