[NEW] [UNPATCHED] [high] Flowise: Multiple vulnerabilities
An attacker can exploit multiple vulnerabilities in Flowise to bypass security measures, disclose information, and manipulate data.
CSIRTS triage
- What
- Multiple vulnerabilities allow attackers to bypass security measures, disclose information, and manipulate data.
- Who is affected
- All Flowise deployments are affected; patch status unknown.
- Urgency
- High; multiple high-impact vulnerabilities present and no patch reported to be available.
- Action
- Monitor for security updates from Flowise; apply immediately when available or implement compensating controls.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2703
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-676210.27% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 19% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-676220.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 16% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-706360.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 30% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-67621 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-67622 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-70636 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- highCVE-2026-70636: Flowise through 3.1.4 contains an authentication bypass vulnerability that allows unauthentica…nvd
- criticalCVE-2026-67622: Flowise through 3.1.4 contains an insecure direct object reference vulnerability in the OpenAI…nvd
- highCVE-2026-67621: Flowise through 3.1.4 contains a missing authorization vulnerability that allows authenticated…nvd
Recent advisories for Flowise
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- high[NEW] [high] Flowise: Multiple vulnerabilitiescert-bund · 2026-08-14
- mediumCVE-2026-73604: Flowise before 3.1.3 contains an incomplete credential redaction vulnerability in the GET /api…nvd · 2026-08-13
- unknownCVE-2026-73603: Flowise before 3.1.4 fails to validate chatflow visibility in the unauthenticated text-to-spee…nvd · 2026-08-13
- unknownCVE-2026-73602: Flowise before 3.1.3 contains a sandbox escape vulnerability in the vm2 JavaScript sandbox tha…nvd · 2026-08-13
- unknownCVE-2026-73601: Flowise versions before 3.1.3 contain a remote code execution vulnerability in the Custom MCP …nvd · 2026-08-13
- unknownCVE-2026-73488: Flowise versions before 3.1.3 contain an insecure direct object reference vulnerability in the…nvd · 2026-08-13
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