CVE-2026-56269
Flowise - Weak Default Token Hash Secret in JWT Token Encryption
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.
INFO
Published Date :
June 24, 2026, 11:53 a.m.
Last Modified :
June 24, 2026, 11:53 a.m.
Remotely Exploit :
No
Source :
VulnCheck
Affected Products
The following products are affected by CVE-2026-56269
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 |
Solution
- Update Flowise to version 3.1.0 or later.
- Configure a strong, unique TOKEN_HASH_SECRET environment variable.
- Restart the Flowise service after applying changes.
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CVE-2026-56269 vulnerability anywhere in the article.