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.
Affected products
1- Python/Pythondescription
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
46- github.com/python/cpython/issues/102988nvdExploitIssue Tracking
- python.orgnvdVendor Advisory
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- python-security.readthedocs.io/vuln/email-parseaddr-realname.htmlnvdVendor Advisory
- security.netapp.com/advisory/ntap-20230601-0003/nvdThird Party Advisory
- seclists.org/fulldisclosure/2025/Apr/8nvd
- cert-portal.siemens.com/productcert/html/ssa-202008.htmlnvd
- cert-portal.siemens.com/productcert/html/ssa-577017.htmlnvd
- lists.debian.org/debian-lts-announce/2024/11/msg00024.htmlnvd
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News mentions
1- Siemens Ruggedcom RoxCISA Alerts