Disclosure summary
BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Prior to 1.4.36, the safe_extract_tarfile() function validates that each tar member's path is within the destination directory, but for symlink members it only validates the symlink's own path, not the symlink's target. An attacker can create a malicious bento/model tar file containing a symlink pointing outside the extraction directory, followed by a regular file that writes through the symlink, achieving arbitrary file write on the host filesystem. This vulnerability is fixed in 1.4.36.
Source-reported weakness categories
CWE-59
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2026-27905
Open original source · Updated Oct 07, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| bentoml | bentoml | * {"versionEndExcluding":"1.4.36"} |
Original records & references
- NIST NVD record
- CVE Program record
- github.com — Patch
- github.com — Exploit, Mitigation, Vendor Advisory
PUBLISHED 2026-03-03T18:15:55-05:00
MODIFIED 2026-10-07T04:10:00-04:00
INGESTED 2026-10-08T12:40:21-04:00