Disclosure summary
An issue was discovered in Python through 2.7.16, 3.x through 3.5.7, 3.6.x through 3.6.9, and 3.7.x through 3.7.4. The email module wrongly parses email addresses that contain multiple @ characters. An application that uses the email module and implements some kind of checks on the From/To headers of a message could be tricked into accepting an email address that should be denied. An attack may be the same as in CVE-2019-11340; however, this CVE applies to Python more generally.
Source-reported weakness categories
NVD-CWE-noinfo, CWE-20
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2019-16056
Open original source · Updated Oct 07, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| python | python | * {"versionStartIncluding":"3.7.0","versionEndIncluding":"3.7.4"} |
| fedoraproject | fedora | 29 |
| fedoraproject | fedora | 30 |
| fedoraproject | fedora | 31 |
| debian | debian_linux | 8.0 |
| debian | debian_linux | 9.0 |
| canonical | ubuntu_linux | 12.04 |
| canonical | ubuntu_linux | 14.04 |
| canonical | ubuntu_linux | 16.04 |
| canonical | ubuntu_linux | 18.04 |
| canonical | ubuntu_linux | 19.04 |
| redhat | software_collections | 1.0 |
| oracle | communications_operations_monitor | * {"versionStartIncluding":"4.1","versionEndIncluding":"4.3"} |
| oracle | communications_operations_monitor | 3.4 |
| oracle | peoplesoft_enterprise_peopletools | 8.57 |
| oracle | peoplesoft_enterprise_peopletools | 8.58 |
| oracle | zfs_storage_appliance_kit | 8.8 |
| oracle | solaris | 11 |
| opensuse | leap | 15.0 |
| opensuse | leap | 15.1 |
Original records & references
- NIST NVD record
- CVE Program record
- access.redhat.com — Third Party Advisory
- access.redhat.com — Third Party Advisory
- bugs.python.org — Issue Tracking, Vendor Advisory
- github.com — Patch
- lists.apache.org
- lists.debian.org — Mailing List, Third Party Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- security.netapp.com — Third Party Advisory
- usn.ubuntu.com — Third Party Advisory
- usn.ubuntu.com — Third Party Advisory
- www.oracle.com — Patch, Third Party Advisory
- www.oracle.com — Patch, Third Party Advisory
- access.redhat.com — Third Party Advisory
- access.redhat.com — Third Party Advisory
- bugs.python.org — Issue Tracking, Vendor Advisory
- github.com — Patch
- lists.apache.org
- lists.debian.org — Mailing List, Third Party Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- lists.fedoraproject.org
- security.netapp.com — Third Party Advisory
- usn.ubuntu.com — Third Party Advisory
- usn.ubuntu.com — Third Party Advisory
- www.oracle.com — Patch, Third Party Advisory
- www.oracle.com — Patch, Third Party Advisory
PUBLISHED 2019-09-06T14:15:15-04:00
MODIFIED 2026-10-07T15:17:12-04:00
INGESTED 2026-10-08T12:30:34-04:00