CVE-2023-27043: exploitation status and patch state

CVE-2023-27043 · CVSS 5.3 MEDIUM · EPSS 3%

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.

Is CVE-2023-27043 exploited?

Which products and versions are affected?

No affected package list recorded here yet.

Is there a patch?

No patch identifier recorded here yet.

What PlainSec published about CVE-2023-27043

Primary sources

What this record does not say

KEV and EPSS are re-checked daily. Record last updated 2026-08-15.