CVE-2026-48519 json
Langflow: Unauthenticated RCE in Shareable Playgrounds
published 2026-06-16 4 mo ago modified 2026-10-26 14 d ago also EUVD-2026-38514 , GHSA-v5ff-9q35-q26f , PYSEC-2026-243
- cvss
- 9.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 56%
- public exploits
- 0
- none known
Summary
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.2, the "Shareable Playground" (or "Public Flows" in code) contains a critical RCE vulnerability. Shareable Playground feature works by enabling the execution of workflows by unauthenticated users, by accessing a link. Specifically, it enables the route /api/v1/build_public_tmp to execute any public flow, given a public flow ID. When the route executes the flow, it allows for providing arbitrary custom Python code as the nodes code, inside the JSON payload. The vulnerable field is data.nodes[X].data.node.template.code.value. This vulnerability is fixed in 1.9.2.
Patch / fix
- pypi langflow 1.9.2
- langflow langflow 1.9.2
- langflow-ai langflow 1.9.2
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 4 mo ago
Exploit prediction
0.78% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/langflow-ai/langflow/security/advisories/GHSA-v5ff-9q35-q26f referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
| GitHub | 3.1 | 9.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
| OSV | 3.1 | 9.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | langflow | <1.9.2 |
1.9.2 |
Affected products
- langflow-ai langflow
Classification
- Weakness
-
- CWE-94 Improper Control of Generation of Code
References
-
github.com
/langflow-ai/langflow/security/advisories/GHSA-v5ff-9q35-q26f
exploit, web, vendor-advisory, evidence
-
nvd.nist.gov
/vuln/detail/CVE-2026-48519
advisory
-
github.com
/langflow-ai/langflow
package
-
github.com
/pypa/advisory-database/tree/main/vulns/langflow/PYSEC-2026-243.yaml
web
Sources
- CVE List CVE-2026-48519
- GitHub Advisory GHSA-v5ff-9q35-q26f
- NVD CVE-2026-48519
- OSV PYSEC-2026-243
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.