CVE-2026-15308 Affecting python3.6 package, versions <3.6.9-1~18.04ubuntu1.13+esm10


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.64% (48th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-UBUNTU1804-PYTHON36-17940482
  • published11 Sept 2026
  • disclosed9 Jul 2026

Introduced: 9 Jul 2026

CVE-2026-15308  (opens in a new tab)

How to fix?

Upgrade Ubuntu:18.04 python3.6 to version 3.6.9-1~18.04ubuntu1.13+esm10 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3.6 package and not the python3.6 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

The incremental HTML parser (html.parser.HTMLParser) allows for CPU denial-of-service through repeated unterminated markup declarations when processing uncontrolled data.

CVSS Base Scores

version 3.1