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HighVulnerabilityCVE-2026-27975updated 27 Oct 2026, 13:28 UTC

aj (Python package) lets unauthenticated users run code on the server

Someone who has no login can get into the server running this software and make it run commands they choose. Updating the package closes the hole.

Fixed in 2.2.13Official source
SeverityHighCVSS 8.1 of 10
Being exploited?UnclearNo reports either way yet
Fix available?Yes2.2.13 · since 27 Oct 2026
How sure is this?Official sourceBacked by an official source

What happened

The pip package 'aj' has a flaw that lets an unauthenticated user gain access to a server and execute arbitrary code on it. The advisory does not describe the specific vulnerable component.

Why it is dangerous: Remote code execution without authentication gives an attacker full control of the affected server, including its data and other systems it can reach. Anyone running an affected version exposed to a network is at risk.

Are you affected?

You are affected if you run the pip package 'aj' earlier than version 2.2.13.

Package / productAffected versionsFixed in
aj · pip< 2.2.132.2.13

What to do

  1. Upgrade the 'aj' pip package to version 2.2.13 or later
  2. Check whether any server running 'aj' was reachable from untrusted networks before patching
  3. Review server logs for unexpected access or commands if exposure is suspected

Timeline

  1. 27 Oct 2026, 13:27 UTC
    Publicly disclosed
  2. 27 Oct 2026, 13:27 UTC
    Reported by GitHub Advisory · GitHub Advisory
  3. 27 Oct 2026, 13:28 UTC
    Picked up by Zero Radar

Sources 1 report, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-27975 · GHSA-vcw3-r3fx-j444
CVSS
8.1 / 10
EPSS
0.6% chance of exploitation within 30 days
Disclosed
27 Oct 2026, 13:27 UTC
On Zero Radar
27 Oct 2026, 13:28 UTC (0 min after disclosure)
Last change
27 Oct 2026, 13:28 UTC

The plain-language parts and the attack diagram were written by an AI model (anthropic/claude-haiku-5.5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

aj (Python package) lets unauthenticated users run code on the server · Zero Radar