What’s Vulnerable › Vulnerabilities

CVE-2026-101998: Fail-open response masking in Docker Sandboxes can expose proxy-managed credentials

• Severity: medium (CVSS 5.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-08 · updated 2026-10-08
• Weakness: CWE-636

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.

Affected products

• Docker Sandboxes: from 0.21.0 before 0.47.0 — fixed in 0.47.0

How to fix

Upgrade to a fixed version: Docker Sandboxes 0.47.0. Check the vendor advisory for mitigations.

References

• https://docs.docker.com/ai/sandboxes/
• https://docs.docker.com/ai/sandboxes/configuration/credentials/#how-credential-injection-works

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