CVE-2026-33484 is a high-severity missing authorization vulnerability in langflow (pip), affecting versions >= 1.0.0, < 1.9.0. It is fixed in 1.9.0.
Summary The /api/v1/files/images/{flowid}/{filename} endpoint serves image files without any authentication or ownership check. Any unauthenticated request with a known flowid and filename returns the image with HTTP 200. Details src/backend/base/langflow/api/v1/files.py:138-164, downloadimage takes flowid: UUID as a bare path parameter with no Depends(getflow) or CurrentActiveUser. All other file routes (downloadfile, uploadfile, listfiles, deletefile) use Depends(getflow) which enforces both authentication and ownership. There is no global auth middleware on /api/v1; protection is per-endpoint only. PoC Impact Unauthenticated cross-tenant data leak. In a multi-tenant deployment, any attacker who can discover or guess a flow_id (UUIDs can be leaked through other API responses) can download any user's uploaded images without credentials.
The application does not perform an authorization check before performing a sensitive operation. Typical impact: unauthorized access to restricted functionality or data.
CVE-2026-33484 has a CVSS score of 7.5 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment.
A fixed version is available (1.9.0). Upgrading removes the vulnerable code path.
pip
langflow (>= 1.0.0, < 1.9.0)langflow → 1.9.0 (pip)Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter instead of chasing every advisory.
Kodem's runtime-powered SCA identifies whether CVE-2026-33484 is reachable in your applications. Explore open-source security for your team.
See if CVE-2026-33484 is reachable in your applications. Get a demo
Upgrade langflow to 1.9.0 or later to resolve this vulnerability.
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
CVE-2026-33484 is a high-severity missing authorization vulnerability in langflow (pip), affecting versions >= 1.0.0, < 1.9.0. It is fixed in 1.9.0. The application does not perform an authorization check before performing a sensitive operation.
CVE-2026-33484 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
langflow (pip) versions >= 1.0.0, < 1.9.0 is affected.
Yes. CVE-2026-33484 is fixed in 1.9.0. Upgrade to this version or later.
Whether CVE-2026-33484 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
Upgrade langflow to 1.9.0 or later.