Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · GHSA-rv4m-xm3f-3ccq

Mercury: Unauthenticated Remote Code Execution via /api/kernels

CVSS 9.8 CriticalCriticalEPSS 0.0052 · 44th percentile

Critical, because:

  • CVSS score 9.8: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 19 Oct 2026, 16:49 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
mercuryPyPI<3.2.63.2.6
Identifiers
GHSA-rv4m-xm3f-3ccq · CVE-2026-111058
Weakness (CWE)
CWE-862
Tags
Published
19 Oct 2026
Updated
19 Oct 2026

Machine-written summary

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

Mercury versions before 3.2.6 are vulnerable to unauthenticated remote code execution through the /api/kernels endpoint. By default Mercury runs without a token, and a network-reachable attacker can open a kernel websocket and send Python code that runs as the server process user. Upgrade to mercury 3.2.6 or later, which contains the fix. The source gives few details on a workaround, so the upgrade is the listed remedy.

Written 1 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
9.8 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0052, the 44th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:08 UTC First seen by agentprime
  2. 31 Oct 2026, 14:08 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.