Rembg is a tool to remove images background. Prior to 2.0.82, the public /api/remove endpoint passes attacker-controlled extras.sammodel through rembg/commands/scommand.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 sammodel 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.

rembg server is vulnerable to Server-Side Request Forgery (SSRF) and a weak default CORS configuration, which may allow an attacker website to send requests to servers on the internal network and view image responses.

rembg server is vulnerable to Server-Side Request Forgery (SSRF) and a weak default CORS configuration, which may allow an attacker website to send requests to servers on the internal network and view image responses.