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Fencer Vulns
critical 9.6

CVE-2026-46703 json

BoxLite: Path Traversal Vulnerability in boxlite Leads to Arbitrary File Write on the Host

published 2026-05-16 5 mo ago modified 2026-10-12 27 d ago also GHSA-f396-4rp4-7v2j , GO-2026-5344 , PYSEC-2026-298 , RUSTSEC-2026-0148 , EUVD-2026-36165

cvss
9.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits
0
none known

Summary

Boxlite is a sandbox service that allows users to create lightweight virtual machines (Boxes) and launch OCI containers within them to run untrusted code. Prior to version 0.9.0, Boxlite allows users to specify the OCI image used by containers in the sandbox. However, when processing tar entries in OCI images, Boxlite does not account for the possibility that entries may be symlinks pointing to absolute paths. An attacker can craft a malicious OCI image and distribute it on image hosting platforms such as DockerHub, tricking users into using it. Once a user loads the malicious image, the attacker can write arbitrary content to any path on the host, which can further lead to remote code execution on the host. This issue has been patched in version 0.9.0.

Patch / fix

  • pypi boxlite 0.9.0
  • crates.io boxlite-cli 0.9.0
  • crates.io boxlite 0.9.0
  • npm @boxlite-ai/boxlite 0.9.0
  • go github.com/boxlite-ai/boxlite/sdks/go 0.9.0
  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1

opensuse advisories openSUSE-SU-2026:21483-1

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
4 mo ago

Exploit prediction

0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/boxlite-ai/boxlite/security/advisories/GHSA-f396-4rp4-7v2j referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 9.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
GitHub 3.1 9.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
OSV 3.1 9.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
OSV 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
pypi boxlite
<0.9.0
0.9.0
crates.io boxlite-cli
<0.9.0
0.9.0
crates.io boxlite
<0.9.0
>=0.0.0-0, <0.9.0
0.9.0
npm @boxlite-ai/boxlite
<0.9.0
0.9.0
go github.com/boxlite-ai/boxlite/sdks/go
<0.9.0
0.9.0

Affected products

  • boxlite-ai boxlite

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.