CVE-2026-34783
HIGH
MEDIUM
Priority: 0.04
BB Relevance:
66/100
Published: 2026-04-06
Modified: 2026-10-23
First seen: 2026-10-29
Status: active
Attack Surface
Network
Low Complexity
No Auth
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
Required
S:
Unchanged
C:
None
I:
High
A:
High
Description
Ferret is a declarative system for working with web data. Prior to 2.0.0-alpha.4, a path traversal vulnerability in Ferret's IO::FS::WRITE standard library function allows a malicious website to write arbitrary files to the filesystem of the machine running Ferret. When an operator scrapes a website that returns filenames containing ../ sequences, and uses those filenames to construct output paths (a standard scraping pattern), the attacker controls both the destination path and the file content. This can lead to remote code execution via cron jobs, SSH authorized_keys, shell profiles, or web shells. This vulnerability is fixed in 2.0.0-alpha.4.
Affected Software (4)
| Vendor | Product | Version |
|---|---|---|
| montferret | ferret | < 2.0.0 |
| montferret | ferret | 2.0.0 |
| montferret | ferret | 2.0.0 |
| montferret | ferret | 2.0.0 |
References & Advisories (2)
Patch
Exploit
Mitigation
Vendor Advisory