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CVE-2026-56271VulnerabilityPublished

Flowise versions 3.0.13 and earlier use weak hardcoded default JWT secrets and default audience and issuer values in their enterprise passport authentication middleware

Affects FlowiseSource GCVE Database

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Not known to be exploited · CVSS 9.8 Critical : upgrade to 3.1.0 as a priority.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.6% chance of exploitation in 30 days – higher than 51% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 3.1.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 12 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade flowiseai/Flowise to 3.1.0.

Affected software

ProductAffectedFixed in
GitHubflowiseai/Flowisepkg:github/flowiseai/FlowiseOther threatsAffected
  • <3.1.0
Fixed in
  • 3.1.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

If you cannot patch yet, ensure that the environment variables JWT_AUTH_TOKEN_SECRET, JWT_REFRESH_TOKEN_SECRET, JWT_AUDIENCE, and JWT_ISSUER are explicitly set to strong, unique values to prevent fallback to weak defaults.

Description

Flowise versions 3.0.13 and earlier use weak hardcoded default JWT secrets and default audience and issuer values in their enterprise passport authentication middleware. If the environment variables for these JWT parameters are not set, the application falls back to publicly known default values, enabling attackers to forge valid JWTs and impersonate any user, including administrators, leading to authentication bypass.

References

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