PSF-2019-5

    Dashboard / Vulnerabilities / PSF-2019-5

    PSF-2019-5

    Published: 6 Sept 2019Last Modified: 9 Oct 2025

    Summary: email.utils.parseaddr mistakenly parse an email

    Details: 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.

    References: https://bugs.python.org/issue34155, https://medium.com/@fs0c131y/tchap-the-super-not-secure-app-of-the-french-government-84b31517d144, https://twitter.com/fs0c131y/status/1119143946687434753

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -063eba280a11d3c9a5dd9ee5abe4de640907951b

    Affected versions

    2.5

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High