Vulnerability details
CVE-2026-78191
WebDyne versions from 2.031 before 3.022 for Perl execute files with .psp anywhere in the name as Perl pages
CVSS 3.1
9.8Critical
Official description
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.8Critical | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| No product information recorded. | |||
References and advisories
1
Kolun on Telegram @kolunsec
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Details
- Published
- 2026-10-31
- Last updated
- 2026-11-06
- State
- Published
- Assigner (CNA)
- CPANSec
Exploit prediction (EPSS)
0.47%
Probability of exploitation in 30 days
41.1%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-777Regular Expression without Anchors