PatchTheCVEultrajson vulnerabilities and fixes
Recent CVEs affecting ultrajson, with upgrade or downgrade steps. 1 tracked.
ultrajson has 1 tracked vulnerability, 0 critical. A fixed release or vendor patch exists for 1. Most recent: 2026-06-22. Highest priority: CVE-2026-54911 (score 35/100).
- CVE-2026-54911 MEDIUM 6.5 UPGRADE UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+
FAQ
How do I fix ultrajson 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 ultrajson being exploited right now?
None of the tracked ultrajson CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which ultrajson CVE should I patch first?
CVE-2026-54911 currently ranks highest (35/100): UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+.