CVE-2026-101998

Fail-open response masking in Docker Sandboxes can expose proxy-managed credentials

State: Published
Severity: 5.9 Medium
Published: Oct 8, 2026
Updated: Oct 8, 2026
Reserved: Sep 28, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.9 Medium	CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N	Docker

Weaknesses

CWE-636 Not Failing Securely ('Failing Open')

Affected Products

Product	Versions
Docker SandboxesDocker	0.21.0 to before 0.47.0Affected

References

https://docs.docker.com/ai/sandboxes/product
https://docs.docker.com/ai/sandboxes/configuration/credentials/#how-credential-injection-workstechnical-description

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