SSRF in Langgenius Dify
CVE-2026-6618
A flaw has been found in langgenius dify up to 1.13.3. This issue affects the function parse_openai_plugin_json_to_tool_bundle of the file api/core/tools/utils/parser.py of the component ApiBasedToolSchemaParser. Executing a manipulation of the argument url can lead to server-side request forgery. The attack can 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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (25.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Langgenius Dify — versions 1.13.0, 1.13.1, 1.13.2
Weakness classification (CWE)
References
- vuldb.com/vuln/358253 (technical-description, vdb-entry)
- vuldb.com/vuln/358253/cti (signature, permissions-required)
- vuldb.com/submit/792241 (third-party-advisory)
- gist.github.com/chenhouser2025/d7b1c574b0e32eb9169f7046b486e662 (exploit)
Frequently asked questions
- What is CVE-2026-6618?
- CVE-2026-6618 is a medium-severity vulnerability in Langgenius Dify, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.3/10. Published 2026-04-20.
- How severe is CVE-2026-6618?
- Medium severity. CVSS v3 base score is 6.3 out of 10.