Vulnerability in Flowise
CVE-2026-56269
Flowise before 3.1.0 (npm package flowise, versions 3.0.13 and earlier) uses a weak hardcoded default value 'Secre$t' for the TOKEN_HASH_SECRET environment variable in packages/server/src/enterprise/utils/tempTokenUtils.ts when the variable is not configured. This secret derives the AES-256-CBC key used to encrypt user IDs and workspace IDs in the 'meta' field of JWT tokens. An attacker who knows the default secret can decrypt this metadata to extract internal user and workspace identifiers, and re-encrypt manipulated values such as altered user or workspace IDs. Because the JWT signature is validated separately, decrypting or tampering with this metadata does not by itself grant access, but the disclosure of internal identifiers and possible metadata manipulation could aid privilege escalation or unauthorized data access.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.001 (2.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
- Flowise — versions 0, 3.1.0
- Flowiseai Flowise
Weakness classification (CWE)
References
- github.com/FlowiseAI/Flowise/security/advisories/GHSA-m7mq-85xj-9x33 (vendor-advisory, Mitigation, Vendor Advisory)
- www.vulncheck.com/advisories/flowise-weak-default-token-hash-secret-in-jwt-toke… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-56269?
- CVE-2026-56269 is a medium-severity vulnerability in Flowise, classified under Use of Hard-coded Credentials. CVSS score: 4.6/10. Published 2026-06-24.
- How severe is CVE-2026-56269?
- Medium severity. CVSS v3 base score is 4.6 out of 10.