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VulnerabilityPublished

CVE-2026-34783: MontFerret ferret · Path Traversal

Affects MontFerret ferretSource CVE Database V5

0
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Not known to be exploited · CVSS 8.1 High : upgrade to 2.0.0-alpha.4 soon.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
8.1High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 43% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2.0.0-alpha.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade MontFerret ferret to 2.0.0-alpha.4.

Affected software

ProductAffectedFixed in
MontFerretferretAffected
  • <2.0.0-alpha.4
Fixed in
  • 2.0.0-alpha.4
GitHubmontferret/ferretpkg:github/montferret/ferretOther threatsAffected
  • =2.0.0-alpha.4
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade MontFerret ferret to version 2.0.0-alpha.4 or later, where this path traversal vulnerability is fixed. Until upgraded, avoid scraping untrusted websites that may return filenames with '../' sequences or sanitize filenames before use to prevent path traversal.

Description

CVE-2026-34783 is a path traversal vulnerability in MontFerret's ferret product prior to version 2.0.0-alpha.4. The flaw exists in the IO::FS::WRITE standard library function, allowing a malicious website to cause Ferret to write arbitrary files to the host filesystem by using crafted filenames containing '.. /' sequences. This can enable attackers to control both the destination path and file content, potentially leading to remote code execution through mechanisms like cron jobs, SSH authorized_keys, shell profiles, or web shells. The vulnerability is fixed in version 2.0.0-alpha.

References

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