CVE-2026-101998
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Docker Sandboxes Credential Leak via Response Handling

Publication date: 2026-10-08

Last updated on: 2026-10-08

Assigner: Docker Inc.

Description
Docker Sandboxes could fail open while masking credentials in protected proxy responses. When a response-body read returned data together with an error, affected handlers could forward unmasked bytes. Code inside an authorized sandbox could use this to recover host-managed OAuth access and refresh tokens or a derived Anthropic API key intended to remain outside the sandbox.

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Meta Information

Published
2026-10-08
Last Modified
2026-10-08
Generated
2026-10-09
AI Q&A
2026-10-08
EPSS Evaluated
N/A
NVD
CVE-2026-101998
EUVD
EUVD-2026-95157

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Docker Docker Sandboxes 0.21.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-636 When the product encounters an error condition or failure, its design requires it to fall back to a state that is less secure than other options that are available, such as selecting the weakest encryption algorithm or using the most permissive access control restrictions.

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Executive Summary

Docker Sandboxes could fail to properly mask credentials in proxy responses. When a response-body read returned data with an error, affected handlers might forward unmasked bytes. This could allow code inside an authorized sandbox to recover host-managed OAuth tokens or API keys that were meant to stay outside the sandbox.

Impact Analysis

An attacker with access to an authorized sandbox could potentially steal OAuth access or refresh tokens and API keys. This could lead to unauthorized access to user accounts, data breaches, or further compromise of systems relying on these credentials.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating confidentiality requirements in GDPR and HIPAA. Organizations may face compliance violations, legal penalties, and reputational damage due to potential data exposure.

Mitigation Strategies

Update Docker Sandboxes to the latest patched version to prevent credential exposure in proxy responses. Monitor network traffic for unauthorized access attempts or unusual data flows that may indicate token or key leakage.

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