Advisory details:
pypa / langflow/PYSEC-2026-2569
| Advisory ID | pypa/langflow/PYSEC-2026-2569 |
| Aliases |
CVE-2026-6599
GHSA-v66p-f7x3-4794 PYSEC-2026-2569 |
| Summary | Langflow vulnerable to injection A vulnerability was detected in langflow-ai langflow up to 1.8.3. The impacted element is the function get_client_ip/install_mcp_config of the file src/backend/base/langflow/api/v1/mcp_projects.py of the component Model Context Protocol Configuration API. Performing a manipulation of the argument X-Forwarded-For results in injection. The attack may be initiated remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 5.7 |
| Risk | 2.9 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| There are no known CWE. |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 6.3 | https://github.com/pypa/advisory-database/blob/main/vulns/langflow/PYSEC-2026-2569.yaml |
| cvssv4 | 2.1 | https://github.com/pypa/advisory-database/blob/main/vulns/langflow/PYSEC-2026-2569.yaml |
| Reference id | Reference type | URL |
|---|---|---|
| https://github.com/langflow-ai/langflow | ||
| https://pypi.org/project/langflow | ||
| 358234 | Advisory | https://vuldb.com/vuln/358234 |
| 791922 | Advisory | https://vuldb.com/submit/791922 |
| a909c47316b7a0948ee68c109ab747a3 | Exploit | https://gist.github.com/chenhouser2025/a909c47316b7a0948ee68c109ab747a3 |
| cti | Other | https://vuldb.com/vuln/358234/cti |
| CVE-2026-6599 | https://nvd.nist.gov/vuln/detail/CVE-2026-6599 | |
| GHSA-v66p-f7x3-4794 | https://github.com/advisories/GHSA-v66p-f7x3-4794 |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
| Attack Vector (AV) | Attack Complexity (AC) | Attack Requirements (AT) | Privileges Required (PR) | User Interaction (UI) | Vulnerable System Impact Confidentiality (VC) | Vulnerable System Impact Integrity (VI) | Vulnerable System Impact Availability (VA) | Subsequent System Impact Confidentiality (SC) | Subsequent System Impact Integrity (SI) | Subsequent System Impact Availability (SA) |
|---|---|---|---|---|---|---|---|---|---|---|
network adjacent local physical |
low high |
none present |
none low high |
none passive active |
high low none |
high low none |
high low none |
high low none |
high low none |
high low none |
Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-20T14:24:29Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/6xxx/CVE-2026-6599.json
Source Advisory: vulnrichment/CVE-2026-6599
[{'Exploitation': 'poc'},
{'Automatable': 'no'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]