CVE-2026-40086Public exploitNetwork attack vector

Unauthenticated filesystem disclosure via unchecked model path

Published Apr 10, 2026 · Updated Apr 10, 2026

Path traversal in the Daniel Gatis rembg HTTP server before 2.0.75 allows remote attackers to probe arbitrary server files through a model path. The /api/remove handler parses extras JSON without validation, passes model_path into a custom session, and ONNX Runtime opens the resolved path as a model. The server must run in HTTP mode and be network-reachable; no authentication or user interaction is required, and errors disclose file existence, permissions, or contents.

CVSS severity5.3
Medium
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in the Daniel Gatis rembg HTTP server before 2.0.75 allows remote attackers to probe arbitrary server files through a model path. The /api/remove handler parses extras JSON without validation, passes model_path into a custom session, and ONNX Runtime opens the resolved path as a model. The server must run in HTTP mode and be network-reachable; no authentication or user interaction is required, and errors disclose file existence, permissions, or contents.

The record

CVE
CVE-2026-40086
Published
Apr 10, 2026
Updated
Apr 10, 2026
Vendor
Daniel Gatis
Product
rembg
Classifications
CWE-73, CWE-22, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.0.75

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Daniel Gatis · rembgversion=< 2.0.75

Published CVSS scores

5.3GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-73External Control of File Name or Path
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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