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CVE-2026-46703 boxlite-ai CVE debrief

CVE-2026-46703 is a critical vulnerability in Boxlite, a sandbox service for running untrusted code. The flaw allows attackers to write arbitrary content to any path on the host, potentially leading to remote code execution. This issue was patched in version 0.9.0.

Vendor
boxlite-ai
Product
boxlite
CVSS
CRITICAL 9.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-10
Original CVE updated
2026-06-11
Advisory published
2026-06-10
Advisory updated
2026-06-11

Who should care

Users of Boxlite versions prior to 0.9.0 should update to the latest version to mitigate this vulnerability.

Technical summary

Boxlite, a sandbox service for running untrusted code, had a vulnerability (CVE-2026-46703) that allowed users to specify OCI images for containers. However, Boxlite did not properly handle tar entries in OCI images that were symlinks to absolute paths. An attacker could craft a malicious OCI image, distribute it on platforms like DockerHub, and trick users into using it. Once loaded, the attacker could write arbitrary content to any host path, potentially leading to remote code execution.

Defensive priority

High

Recommended defensive actions

  • Update Boxlite to version 0.9.0 or later.
  • Be cautious when loading OCI images from untrusted sources.
  • Monitor for suspicious activity in your Boxlite environment.

Evidence notes

CVE-2026-46703 has a CVSS score of 9.6 and is considered CRITICAL.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-46703 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-46703

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-46703 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-46703

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.