urllib3 vulnerabilities and fixes

Recent CVEs affecting urllib3, with upgrade or downgrade steps. 3 tracked.

urllib3 has 3 tracked vulnerabilities, 0 critical. A fixed release or vendor patch exists for 3. Most recent: 2026-09-29. Highest priority: CVE-2026-97689 (score 38/100).

• CVE-2026-97687 HIGH 8.1 UPGRADE urllib3 is an HTTP client library for Python
• CVE-2026-97688 MEDIUM 5.3 UPGRADE urllib3 is an HTTP client library for Python
• CVE-2026-97689 HIGH 7.5 UPGRADE urllib3 is an HTTP client library for Python

FAQ

How do I fix urllib3 vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is urllib3 being exploited right now?

None of the tracked urllib3 CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which urllib3 CVE should I patch first?

CVE-2026-97689 currently ranks highest (38/100): urllib3 is an HTTP client library for Python.

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