What is CVE-2026-34783?

CVE-2026-34783 is a high-severity vulnerability in Montferret Ferret, classified under Path Traversal. CVSS score: 8.1/10. Published 2026-04-06.

How severe is CVE-2026-34783?

High severity. CVSS v3 base score is 8.1 out of 10.

Path Traversal in Montferret Ferret

CVE-2026-34783

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 t…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.002 (42.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H.

Affected products

Montferret Ferret — versions < 2.0.0-alpha.4

Weakness classification (CWE)

References

https://github.com/MontFerret/ferret/security/advisories/GHSA-j6v5-g24h-vg4j (x_refsource_CONFIRM)
https://github.com/MontFerret/ferret/commit/160ebad6bd50f153453e120f6d909f5b83322917 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-34783?: CVE-2026-34783 is a high-severity vulnerability in Montferret Ferret, classified under Path Traversal. CVSS score: 8.1/10. Published 2026-04-06.
How severe is CVE-2026-34783?: High severity. CVSS v3 base score is 8.1 out of 10.