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

> CVE-2026-101998: Fail-open response masking in Docker Sandboxes can expose proxy-managed credentials. CVSS 5.9 (CVSS 4.0).

Canonical: https://rewindex.com/cve/CVE-2026-101998
Last updated: 2026-10-08T20:46:35Z

- Published: 2026-10-08 18:47 UTC · Updated: 2026-10-08 20:46 UTC · Assigner: Docker
- CVSS: 5.9 (CVSS 4.0) · Severity: Medium
- EPSS: 0.16%, 5th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: 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 vendors and products

- Docker: Docker Sandboxes

## Tracked companies

- [Docker](https://rewindex.com/company/docker.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-101998)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-101998)
- [https://docs.docker.com/ai/sandboxes/](https://docs.docker.com/ai/sandboxes/)
- [https://docs.docker.com/ai/sandboxes/configuration/credentials/\#how-credential-injection-works](https://docs.docker.com/ai/sandboxes/configuration/credentials/#how-credential-injection-works)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-101998 · Markdown: https://rewindex.com/cve/CVE-2026-101998.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-101998 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:10:12.043Z