CVE-2026-78191

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    CVE-2026-78191

    Published: 31 Oct 2026Last Modified: 8 Nov 2026

    Summary: WebDyne versions from 2.031 before 3.022 for Perl execute files with .psp anywhere in the name as Perl pages

    Details: WebDyne versions from 2.031 before 3.022 for Perl execute files with .psp anywhere in the name as Perl pages. WebDyne decides whether to run a requested file as a page by matching its name against WEBDYNE_PSP_EXT_RE, which has no end anchor. An application that accepts uploads by checking only the final extension lets a remote attacker upload a file such as report.psp.pdf and run its embedded Perl by requesting it.

    References: https://cpan.org/modules, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78191.json, https://metacpan.org/release/ASPEER/WebDyne-3.022/changes, https://nvd.nist.gov/vuln/detail/CVE-2026-78191, https://github.com/aspeer/WebDyne

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 67602dfa2d235cc65942d7cb349794ee2116f86e
    Fixed -afb2fdc452ffda3a1bda1f63ef70b4ba52f083a9

    Affected versions

    v3.21.0

    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
    CVE-2026-78191 | CVE-DB