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Medium severity5.3NVD Advisory· Published Apr 19, 2023· Updated May 12, 2026

CVE-2023-27043

CVE-2023-27043

Description

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.

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Affected products

245

Patches

Vulnerability mechanics

References

46

News mentions

1