CVE-2026-56278

9.1 Critique

Publiée le 01/07/2026 à 01:17 · Modifiée le 06/07/2026 à 17:27 · Analysée par le NVD · Source : disclosure@vulncheck.com

Description

Flowise before 3.1.0 (affected versions 3.0.13 and earlier) uses a weak hardcoded default secret ('flowise') for the express-session middleware when the EXPRESS_SESSION_SECRET environment variable is not set (packages/server/src/enterprise/middleware/passport/index.ts). Because this default secret is publicly visible in the source code, an attacker can forge valid signed session cookies to impersonate any user and bypass authentication.

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Produits concernés

Scores CVSS

Version	Score	Source	Vecteur
4.0	9.3 Critique	disclosure@vulncheck.com	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X`
3.1	9.1 Critique	disclosure@vulncheck.com	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`

Faiblesses (CWE)

CWE-798

Références

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-2qqc-p94c-hxwh MitigationVendor Advisory
https://www.vulncheck.com/advisories/flowise-session-hijacking-via-weak-default-express-session-secret Third Party Advisory

CVE-2026-56278

Description

Produits concernés

Scores CVSS

Faiblesses (CWE)

Références

Ailleurs