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.
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Affected Vendors & Products
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History
Wed, 04 Mar 2026 22:15:00 +0000
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ssvc
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Wed, 04 Mar 2026 15:00:00 +0000
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Bentoml
Bentoml bentoml |
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Bentoml
Bentoml bentoml |
Tue, 03 Mar 2026 23:00:00 +0000
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| Description | 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. | |
| Title | BentoML has an Arbitrary File Write via Symlink Path Traversal in Tar Extraction | |
| Weaknesses | CWE-59 | |
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cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-03-03T22:45:40.434Z
Updated: 2026-03-04T21:23:39.612Z
Reserved: 2026-02-24T15:19:29.718Z
Link: CVE-2026-27905
Updated: 2026-03-04T21:23:35.012Z
Status : Awaiting Analysis
Published: 2026-03-03T23:15:55.897
Modified: 2026-03-04T18:08:05.730
Link: CVE-2026-27905
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