CVE-2025-34291
HIGH8.8⚠ KEVEPSS 32.7%Langflow CORS misconfiguration enables Account Takeover and RCE
Description
Langflow versions up to and including 1.6.9 contain a chained vulnerability that enables account takeover and remote code execution. An overly permissive CORS configuration (allow_origins='*' with allow_credentials=True) combined with a refresh token cookie configured as SameSite=None allows a malicious webpage to perform cross-origin requests that include credentials and successfully call the refresh endpoint. An attacker-controlled origin can therefore obtain fresh access_token / refresh_token pairs for a victim session. Obtained tokens permit access to authenticated endpoints — including built-in code-execution functionality — allowing the attacker to execute arbitrary code and achieve full system compromise.
Affected packages (2)
- PyPI/langflowfrom 0, <= 1.6.9
- PyPI/langflowfrom 0, < 1.7.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H |
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
References (11)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-34291
- PATCHhttps://github.com/langflow-ai/langflow
- WEBhttps://github.com/langflow-ai/langflow/pull/10139
- WEBhttps://github.com/langflow-ai/langflow/pull/10696
- WEBhttps://github.com/langflow-ai/langflow/pull/9240
- WEBhttps://github.com/langflow-ai/langflow/pull/9441
- WEBhttps://github.com/pypa/advisory-database/tree/main/vulns/langflow/PYSEC-2025-78.yaml
- WEBhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-34291
- WEBhttps://www.crowdsec.net/vulntracking-report/cve-2025-34291
- WEBhttps://www.obsidiansecurity.com/blog/cve-2025-34291-critical-account-takeover-and-rce-vulnerability-in-the-langflow-ai-agent-workflow-platform
- WEBhttps://www.vulncheck.com/advisories/langflow-cors-misconfiguration-to-token-hijack-and-rce