Security Flaw in Serena MCP Toolkit by OraiOS
CVE-2026-49471

8.3HIGH

Key Information:

Vendor

OraiOS

Status
Serena
Vendor
CVE Published:
7 July 2026

What is CVE-2026-49471?

The Serena MCP toolkit by OraiOS, prior to version 1.5.2, contains a vulnerability where its web dashboard's built-in Flask API is accessible without authentication on a fixed port. This exposes the system to DNS rebinding attacks, allowing attackers to write arbitrary data to the agent's memory, leading to a chain of events that can execute shell commands with elevated privileges upon the victim visiting a malicious webpage. This significant security issue has been remediated in version 1.5.2.

Affected Version(s)

serena < 1.5.2

References

https://github.com/oraios/serena/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/oraios/serena/commit/016ccbe1c095a3eed...
x_refsource_MISC
https://github.com/oraios/serena/releases/tag/v1.5.2
x_refsource_MISC

CVSS V3.1

Score:
8.3
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.