When a request matches no file, the PSGI handler retries it as an API route through api_filename. That keeps .. segments in the request path and only checks that the joined path starts with the document root, which a request for /../private passes.
A remote attacker can run the embedded Perl in any .psp file the server can read, such as one uploaded to a directory outside the document root.
Analysis
Analysis and contextual insights are available on OpenCVE Cloud.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| unaffected |
|
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Vendor Solution
Upgrade to WebDyne 3.022 or later.
Tracking
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| Link | Providers |
|---|---|
| https://metacpan.org/release/ASPEER/WebDyne-3.022/changes |
|
Sat, 31 Oct 2026 14:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | WebDyne versions from 3.007 before 3.022 for Perl execute .psp files outside the document root via path traversal in the PSGI API route fallback. When a request matches no file, the PSGI handler retries it as an API route through api_filename. That keeps .. segments in the request path and only checks that the joined path starts with the document root, which a request for /../private passes. A remote attacker can run the embedded Perl in any .psp file the server can read, such as one uploaded to a directory outside the document root. | |
| Title | WebDyne versions from 3.007 before 3.022 for Perl execute .psp files outside the document root via path traversal in the PSGI API route fallback | |
| Weaknesses | CWE-22 | |
| References |
|
Subscriptions
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MITRE
Status: PUBLISHED
Assigner: CPANSec
Published:
Updated: 2026-10-31T14:33:55.211Z
Reserved: 2026-08-23T18:38:50.604Z
Link: CVE-2026-78189
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-10-31T15:16:54.003
Modified: 2026-10-31T15:16:54.003
Link: CVE-2026-78189
Redhat
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OpenCVE Enrichment
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