PT-2026-56242 · Oraios · Serena

Goh3St · Published 2026-07-07 · Updated 2026-07-07 · CVE-2026-49471

NVD

CVSS v3.1

8.3

High

Base vector

AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

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.

Fix

Missing Authentication

CSRF

Weakness Enumeration

CWE-306

CWE-352

Related Identifiers

CVE-2026-49471

Affected Products

Serena

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-49471 · Security Note
• https://github.com/oraios/serena/releases/tag/v1.5.2 · Note
• https://github.com/oraios/serena/commit/016ccbe1c095a3eed7967737ac1d4df2754f5d96 · Note
• https://github.com/oraios/serena/security/advisories/GHSA-37h2-6p4f-mp3q · Note