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VulnerabilityPublished

CVE-2026-78189: WebDyne (Perl module) · Path Traversal

Affects WebDyne (Perl module)Source CVE Database V5

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Not known to be exploited : upgrade to 3.022 soon.

Data as of 31 Oct 2026, 14:54 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
  • >=3.007 <3.022
Fixed in
  • 3.022
CPANWebDynepkg:cpan/WebDyneOther threatsAffected
  • >=3.007 <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

A fix is available in WebDyne version 3.022. Users should upgrade to version 3.022 or later to remediate this vulnerability.

Description

CVE-2026-78189 is a path traversal vulnerability in WebDyne Perl versions from 3.007 up to but not including 3.022. It allows remote attackers to execute .psp files outside the document root by exploiting the PSGI API route fallback mechanism. The vulnerability arises because the PSGI handler does not properly sanitize path segments containing '..', enabling access to files outside the intended directory.

References

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