Windows apps · Application version · August 5, 2026

Python 3.13 3.13.15

Python 3.13 3.13.15, released August 5, 2026, fixes 8 CVEs in Python 3.13. None of them is reported as exploited. Patch Radar priority: High. The latest Python 3.13 is 3.13.17, which also fixes every one of these CVEs.

High

Superseded. The latest Python 3.13 is 3.13.17, which also fixes every CVE on this page. Install that instead.

CVEs closed
8
None rated Critical
Exploited
0
None reported
Highest CVSS
8.7
Base score, 0 to 10
Highest EPSS
0.0075
55th percentile

Priority of the 8 CVEs

Patch now 0 Urgent 0 High 4 Routine 4

Applies to

ProductVersion
Python 3.133.13.15

CVEs this fix closes

PriorityCVETitleCVSSEPSSExploitation
High CVE-2026-11940 tarfile extraction filter bypass allows escaping the destination directory7.8 0.0075 None reported
High CVE-2026-11972 tarfile opened in streaming mode mishandles EOF8.2 0.0072 None reported
High CVE-2026-15308 Incremental HTMLParser feed() allows CPU-exhaustion DoS via repeated unterminated markup declarations8.7 0.0064 None reported
High CVE-2025-15366 IMAP command injection in user-controlled commands7.1 0.0043 None reported
Routine CVE-2026-6879 Quadratic Behavior in xml.etree.ElementPath Index Predicates2.0 0.0036 None reported
Routine CVE-2026-12003 CPython >3.11 Insecure Input Validation resulting in privilege escalation5.3 0.0014 None reported
Routine CVE-2026-0864 Configuration Injection via Carriage Return (\r) in write() method5.5 0.0013 None reported
Routine CVE-2026-18503 Super-linear CPU usage for unbounded input to csv.Sniffer.sniff()2.4 0.0012 None reported
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