CVE-2023-27043: Fedoraproject Fedora

Medium severity, CVSS 5.3. EPSS: 2.5% chance of exploitation in the next 30 days.

The email module of Python through 3.11.3 incorrectly parses e-mail addresses that contain a special character. The wrong portion of an RFC2822 header is identified as the value of the addr-spec. In some applications, an attacker can bypass a protection mechanism in which application access is granted only after verifying receipt of e-mail to a specific domain (e.g., only @company.example.com addresses may be used for signup). This occurs in email/_parseaddr.py in recent versions of Python.

Affected products

• Fedoraproject Fedora: version 38 only; version 39 only
• Netapp Active Iq Unified Manager: affected versions not specified
• Netapp Ontap Select Deploy Administration Utility: affected versions not specified
• Python Python: up to and including 2.7.18; from 3.0, before 3.8.20 (fixed in 3.8.20); from 3.9.0, before 3.9.20 (fixed in 3.9.20); from 3.10.0, before 3.10.15 (fixed in 3.10.15); from 3.11.0, before 3.11.10 (fixed in 3.11.10); from 3.12.0, before 3.12.6 (fixed in 3.12.6)

Published 2023-04-19. Last modified 2026-06-17.