# CVE-2025-34267: Flowise Authenticated Command Execution and Sandbox Bypass via Puppeteer & Playwright Packages

Status: published. Published: 2025-10-14. Updated: 2026-11-08.

Flowise v3.0.1 < 3.0.8 and all versions after with 'ALLOW_BUILTIN_DEP' enabled contain an authenticated remote code execution vulnerability and node VM sandbox escape due to insecure use of integrated modules (Puppeteer and Playwright) within the nodevm execution environment. An authenticated attacker able to create or run a tool that leverages Puppeteer/Playwright can specify attacker-controlled browser binary paths and parameters. When the tool executes, the attacker-controlled executable/parameters are run on the host and circumvent the intended nodevm sandbox restrictions, resulting in execution of arbitrary code in the context of the host. This vulnerability was incorrectly assigned as a duplicate CVE-2025-26319 by the developers and should be considered distinct from that identifier.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/FlowiseAI/Flowise/pull/5231

## Affected products and versions

- FlowiseAI / Flowise (flowise): ≥ 3.0.1; ≤ 3.0.8 (affected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 8.4 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:L/VA:L/SC:H/SI:H/SA:L; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: 6.88% as of 2026-11-08; percentile 94.11%

- SSVC: exploitation poc; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-77

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://flowiseai.com/ (CNA: VulnCheck; product)

- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-5w3r-f6gm-c25w (CNA: VulnCheck; vendor-advisory)

- https://github.com/FlowiseAI/Flowise/pull/5231 (CNA: VulnCheck; issue-tracking, patch)

- https://www.vulncheck.com/advisories/flowise-auth-command-execution-and-sandbox-bypass-via-puppeteer-and-playwright-packages (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2025-34267; retrieved 2026-11-08; source updated 2026-11-08

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2025-34267; retrieved 2026-11-08; source updated Not reported

Revision: 7b3ad533d48a0fb8833557b76901002652da627c0516f8e96a4739f9b43df4ce

Canonical: https://y2.dev/cve/CVE-2025-34267

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.