CVE-2026-34783
Last modified
CVE-2026-34783 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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. EPSS estimates a 0.51% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Montferret | Ferret | < 2.0.0 | — |
| Montferret | Ferret | 2.0.0 | Alpha1 |
References
- https://github.com/MontFerret/ferret/security/advisories/GHSA-j6v5-g24h-vg4jExploit, Mitigation, Vendor Advisory
- https://github.com/MontFerret/ferret/security/advisories/GHSA-j6v5-g24h-vg4jExploit, Mitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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