Description
Rembg is a tool to remove images background. Prior to 2.0.82, the public /api/remove endpoint passes attacker-controlled extras.sam_model through rembg/commands/s_command.py to rembg/sessions/sam.py, where it is interpolated into SAM filenames and GitHub download URLs passed to pooch.retrieve() without a pinned hash. An unauthenticated attacker can supply a sam_model value combining path traversal with URL fragment syntax to exploit the HTTP request discarding the fragment while the local POSIX path retains it. The first request primes the attacker-selected path tree, and an identical repeated request downloads malicious ONNX encoder and decoder files beside a readable target file. The graphs can load the target through ONNX external data and encode its bytes into the returned PNG mask, disclosing complete files accessible to the rembg process and allowing arbitrary ONNX computation. This issue is fixed in version 2.0.82.
Published: 2026-10-26
Score: 8.6 High
EPSS: n/a
KEV: No
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History

Mon, 26 Oct 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Danielgatis
Danielgatis rembg
Vendors & Products Danielgatis
Danielgatis rembg

Mon, 26 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Description Rembg is a tool to remove images background. Prior to 2.0.82, the public /api/remove endpoint passes attacker-controlled extras.sam_model through rembg/commands/s_command.py to rembg/sessions/sam.py, where it is interpolated into SAM filenames and GitHub download URLs passed to pooch.retrieve() without a pinned hash. An unauthenticated attacker can supply a sam_model value combining path traversal with URL fragment syntax to exploit the HTTP request discarding the fragment while the local POSIX path retains it. The first request primes the attacker-selected path tree, and an identical repeated request downloads malicious ONNX encoder and decoder files beside a readable target file. The graphs can load the target through ONNX external data and encode its bytes into the returned PNG mask, disclosing complete files accessible to the rembg process and allowing arbitrary ONNX computation. This issue is fixed in version 2.0.82.
Title Rembg: Unauthenticated SAM model injection permits local-file disclosure through malicious ONNX graphs
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 8.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L'}


Subscriptions

Danielgatis Rembg
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-26T19:22:52.720Z

Reserved: 2026-10-23T20:21:45.107Z

Link: CVE-2026-115924

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-26T20:17:52.250

Modified: 2026-10-26T20:17:52.250

Link: CVE-2026-115924

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-26T20:45:13Z

Weaknesses
  • CWE-22

    Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')