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VulnerabilityPublished

CVE-2026-78191: WebDyne versions from 2.031 before 3.022 for Perl execute files with .psp anywhere in the name as

Source GCVE Database

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Authoritative record:CVE-2026-78191· High

Not known to be exploited : upgrade to 3.022 soon.

Data as of 31 Oct 2026, 18:09 UTC

Severity
High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in 3.022

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 31 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade WebDyne (Perl module) to 3.022.

Affected software

ProductAffectedFixed in
WebDyneAffected
  • >=2.031 <3.022
Fixed in
  • 3.022
CPANWebDynepkg:cpan/WebDyneOther threatsAffected
  • >=2.031 <3.022
Fixed in
  • 3.022

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

If you cannot patch yet, applications should not rely solely on the final file extension to validate uploads and should implement stricter validation of filenames and uploaded content to prevent execution of unintended files.

Description

WebDyne versions from 2.031 up to but not including 3.022 for Perl execute files with .psp anywhere in the filename as Perl pages. This behavior allows an attacker to upload files with names like report.psp.pdf and have them executed as Perl code by the server.

References

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