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
No analysis available yet.
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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No data available yet.
Vendor Solution
Upgrade to WebDyne 3.022 or later.
Tracking
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No advisories yet.
| 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
No data.
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
No data.
OpenCVE Enrichment
No data.
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CWE-22
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')