Vulnerability in Flowiseai Flowise
CVE-2026-91937
Flowise before 3.1.4 fails to sanitize the overrideConfig.sessionId parameter before using it in MongoDB queries within the MongoDBMemory node. Unauthenticated attackers can submit MongoDB operator objects through the prediction API to read chat history records belonging to other users from the shared collection.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (40.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/FlowiseAI/Flowise/security/advisories/GHSA-wpvf-4vfx-rgxm (vendor-advisory)
- www.vulncheck.com/advisories/flowise-before-3.1.4-nosql-injection-via-sessionid (third-party-advisory)
Frequently asked questions
- What is CVE-2026-91937?
- CVE-2026-91937 is a high-severity vulnerability in Flowiseai Flowise, classified under Improper Neutralization of Special Elements in Data Query Logic. CVSS score: 7.5/10. Published 2026-09-15.
- How severe is CVE-2026-91937?
- High severity. CVSS v3 base score is 7.5 out of 10.