{"id":"CVE-2026-51886","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-51886","generatedAt":"2026-10-23T21:17:55.588Z","title":"langflow-ai langflow v1.9.3 is affected by: Code Injection.","description":"langflow-ai langflow v1.9.3 is affected by: Code Injection. The impact is: execute arbitrary code (remote). The component is: src/backend/base/langflow/api/v1/validate.py:validate-post_validate_code-a-real-authenticated-http-post-to-api-v1. The attack vector is: Attack surface: HTTP or browser-backed service path. A public-facing route accepts raw Python source and forwards it into a server-side compile/exec validation path without any visible entitlement guard. ¶¶ A weakness has been identified in langflow-ai langflow up to 1.9.3. langflow contains a code injection vulnerability in validate-post_validate_code-a-real-authenticated-http-post-to-api-v1 (src/backend/base/langflow/api/v1/validate.py:13). An authenticated attacker can execute arbitrary Python code on the server by submitting malicious code to the /api/v1/validate/code endpoint, which directly executes user-supplied code without sandboxing or security controls.","published":"2026-10-01T22:17:03.000Z","lastModified":"2026-10-06T01:16:36.000Z","status":"Awaiting Analysis","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-94"],"affected":[],"epss":{"score":0.00403,"percentile":0.33435,"date":"2026-10-22","history":[{"date":"2026-10-02","score":0.00171,"percentile":0.05834}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-06T01:45:03.000Z","detail":{"from":null,"score":"9.8","severity":"CRITICAL","fromSeverity":null},"summary":"Now scored CVSS 9.8 CRITICAL."},{"kind":"new","label":"New CVE","at":"2026-10-01T22:17:03.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-01T22:17:03.387Z"},"summary":"New CVE, critical severity (CVSS 9.8)."}],"references":[{"url":"https://gist.github.com/Ro1ME/c11b1e63e4e8fca6b25275144f25ec2a","source":"cve@mitre.org"},{"url":"https://github.com/langflow-ai/langflow/issues/13336","source":"cve@mitre.org"},{"url":"https://github.com/langflow-ai/langflow/issues/13336","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-51886","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}