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CVE-2026-115924

CVE-2026-115924 · Rembg: Unauthenticated SAM model injection permits local-file disclosure through malicious ONNX graphs

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 8.6 · High · EPSS 0.4% · Fix available

Published
Updated

Stack: python

Affected products and versions

  • rembg

    Versions
    • < 2.0.82: Affected

    No fix published

  • rembg PyPI

    Versions
    • 2.0.28
    • 2.0.29
    • 2.0.30
    • 2.0.31
    • 2.0.32
    • 2.0.33
    • 2.0.34
    • 2.0.35
    • 2.0.36
    • 2.0.37
    • 2.0.38
    • 2.0.39
    • 2.0.40
    • 2.0.41
    • 2.0.43
    • 2.0.44
    • 2.0.45
    • 2.0.46
    • 2.0.47
    • 2.0.48
    • 2.0.49
    • 2.0.50
    • 2.0.51
    • 2.0.52
    • 2.0.53
    • 2.0.54
    • 2.0.55
    • 2.0.56
    • 2.0.57
    • 2.0.58
    • 2.0.59
    • 2.0.60
    • 2.0.61
    • 2.0.62
    • 2.0.63
    • 2.0.64
    • 2.0.65
    • 2.0.66
    • 2.0.67
    • 2.0.68
    • 2.0.69
    • 2.0.70
    • 2.0.71
    • 2.0.72
    • 2.0.73
    • 2.0.74
    • 2.0.75
    • 2.0.76
    • 2.0.77
    • 2.0.78
    • 2.0.79
    • 2.0.80
    • 2.0.81
    Affected ranges
    • ECOSYSTEM: < 2.0.82

    Update to 2.0.82

Original sources

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