Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/danielgatis/rembg/commit/b2758c6b39bb2b02df90a031281103394769
- https://github.com/danielgatis/rembg/releases/tag/v2.0.82
- https://github.com/danielgatis/rembg/security/advisories/GHSA-qr6x-7v33-6qmg
- https://github.com/danielgatis/rembg/security/advisories/GHSA-qr6x-7v33-6qmg
FAQ
What is CVE-2026-115924?
CVE-2026-115924 is a vulnerability with a CVSS score of 8.6 (HIGH). 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, ...
How severe is CVE-2026-115924?
CVE-2026-115924 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-115924?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.