CVE-2026-49471 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-49471HIGH

oraios serena — Serena: Unauthenticated Flask dashboard on fixed port enables DNS rebinding → memory poisoning → RCE

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   N   R  C  H  H  H    8.3   .0029   21.7     —

AFFECTED
  Product  Versions   Fixed
  serena   < 1.5.2 –  —

TIMELINE
  May 30  Reserved by GitHub_M
  Jul 7   EXPLOIT PUBLISHED — CVE-2026-49471 (oraios serena). Public exploit reference added.
  Jul 7   Published (CNA: GitHub_M)

CWE-306, CWE-352 · CNA: GitHub_M · CVSS v3.1 · 3 references · NVD 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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
May 30, 2026	Reserved	Reserved by GitHub_M
July 7, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-49471 (oraios serena). Public exploit reference added.
July 7, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
oraios	serena	—	< 1.5.2	—

Weaknesses

CWE-306 · CWE-352

References (3)

https://github.com/oraios/serena/commit/016ccbe1c095a3eed7967737ac1d4df2754f5d96 [Patch]
https://github.com/oraios/serena/releases/tag/v1.5.2 [Release Notes]
https://github.com/oraios/serena/security/advisories/GHSA-37h2-6p4f-mp3q [Exploit, Third Party Advisory]

Authoritative record: CVE-2026-49471 at cve.org

Vendors: oraios

Weaknesses: CWE-306 · CWE-352

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-49471 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.