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CVE-2026-34783

8.1 · HIGH

Ferret is a declarative system for working with web data.

Published Apr 6, 2026CWE-22EPSS 0.71%

Overview

CVE-2026-34783 is a high-severity vulnerability. It was published on April 6, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/MontFerret/ferret/commit/160ebad6bd50f153453e120f6d909f5b83322917GitHubgithub.com/MontFerret/ferret/security/advisories/GHSA-j6v5-g24h-vg4jGitHubgithub.com/MontFerret/ferret/security/advisories/GHSA-j6v5-g24h-vg4j

How CyberStrike helps

Frequently asked questions

What is CVE-2026-34783?

CVE-2026-34783 is a high-severity vulnerability. It was published on April 6, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-34783?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-34783?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-34783?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-34783 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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