Vulnerability · CVE-2019-16056
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.
Published Sep 6, 2019 · catalog updated Oct 14, 2026 · An issue was discovered
Check if you run it
No confirmed exploitation is on record for CVE-2019-16056. EPSS is 5.12%. Act only if a listed version of An issue was discovered is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (An issue was discovered).
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- High7.5
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 5.12%
- Remediation
- Advisory link
- Affected products
- cpe canonical/ubuntu linux · cpe debian/debian linux · cpe fedoraproject/fedora · cpe python/python · cpe redhat/software collections
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe canonical/ubuntu linux12.04
- cpe debian/debian linux8.0
- cpe fedoraproject/fedora29
- cpe python/pythonversion unspecified
- cpe redhat/software collections1.0
How to fix CVE-2019-16056
Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2019-16056. EPSS is 5.12%. Act only if a listed version of An issue was discovered is installed.
Which versions are affected?
Compare what you have installed with canonical/ubuntu linux 12.04; debian/debian linux 8.0; redhat/software collections 1.0. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-20: Improper Input Validation. EPSS 5.12%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Sep 6, 2019 · NIST NVD
Detected
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
Sources
- CVE.orgVulnerability recordCVE-2019-16056
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2019-16056
30-day exploitation probability 5.1%
first.org - NIST NVDVulnerability recordCVE-2019-16056
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 t
nvd.nist.gov
References
Freshness
Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.