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Advisory record · GHSA-37h2-6p4f-mp3q

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

CVSS 8.3 HighEPSS 0.0037 · 31st percentile

Published by the GitHub Advisory Database at 8 Jul 2026, 21:12 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
serena-agentPyPI<1.5.21.5.2
Identifiers
GHSA-37h2-6p4f-mp3q · CVE-2026-49471 · PYSEC-2026-3061
Weakness (CWE)
CWE-306 · CWE-352
Tags
Published
8 Jul 2026
Updated
13 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Serena (PyPI package serena-agent) versions before 1.5.2 run a built-in web dashboard on a fixed port with no authentication and no Host header validation. A malicious webpage visited by a user running Serena can use DNS rebinding to reach the dashboard API, write content into the agent's persistent memory, and have the agent later run shell commands, leading to remote code execution. Upgrade to serena-agent 1.5.2 or later.

Written 6 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.3 High 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0037, the 31st percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:03 UTC First seen by agentprime
  2. 31 Oct 2026, 15:03 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.