{"cve":"CVE-2026-49471","nvd":{"published":"2026-07-07T21:17:25.833","modified":"2026-10-25T20:10:00.147","status":"Analyzed","description":"Serena is a powerful MCP toolkit for coding that provides semantic retrieval and editing capabilities. Prior to v1.5.2, Serena's built-in web dashboard exposes an unauthenticated Flask API on a fixed, predictable port, with no authentication, no CSRF protection, and no Host header validation. A DNS rebinding attack allows a malicious webpage to reach this API from any browser and write arbitrary content to the agent's persistent memory store, which the agent reads and acts on autonomously. Combined with execute_shell_command using shell=True, this creates a remote code execution chain requiring only that the victim visit a malicious webpage while Serena is running. This issue is fixed in version v1.5.2.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H","score":8.3},"cwes":["CWE-306","CWE-352"],"references":["https://github.com/oraios/serena/commit/016ccbe1c095a3eed7967737ac1d4df2754f5d96","https://github.com/oraios/serena/releases/tag/v1.5.2","https://github.com/oraios/serena/security/advisories/GHSA-37h2-6p4f-mp3q"],"products":["oraios-ai:serena"],"source":"nvd","synced_at":"2026-10-25T23:44:34.550481224+00:00"},"epss":{"cve":"CVE-2026-49471","score":0.00373,"percentile":0.30936,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-37h2-6p4f-mp3q","url":"https://osv.dev/vulnerability/GHSA-37h2-6p4f-mp3q","summary":"Serena: Unauthenticated Flask dashboard on fixed port enables DNS rebinding → memory poisoning → RCE","modified":"2026-07-13T16:42:30.220799654Z","packages":[{"ecosystem":"PyPI","name":"serena-agent","purl":"pkg:pypi/serena-agent","ranges":["<1.5.2"],"fixed":["1.5.2"]}]},{"id":"PYSEC-2026-3061","url":"https://osv.dev/vulnerability/PYSEC-2026-3061","summary":"Serena: Unauthenticated Flask dashboard on fixed port enables DNS rebinding → memory poisoning → RCE","modified":"2026-07-13T16:32:48.400772210Z","packages":[{"ecosystem":"PyPI","name":"serena-agent","purl":"pkg:pypi/serena-agent","ranges":["<1.5.2"],"fixed":["1.5.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}