5.9Medium

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

Docker Docker Sandboxes Published: 2026-10-08 21:47 (1 month ago)

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.

Weakness (CWE): CWE-636

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

Vendor	Product	Versions
Docker	Docker Sandboxes	0.21.0 – < 0.47.0

References and patches

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

CVSS score

5.9Medium

Source: Docker · CVSS 4.0

Attack vector: Adjacent
Attack complexity: Low
Attack requirements: Present
Privileges required: Low
User interaction: None
Confidentiality: High
Integrity: None
Availability: None

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

All scores (2)

cna	CVSS 4.0	5.9Medium
security@docker.com	CVSS 4.0	5.9Medium

EPSS (chance of exploitation in 30 days)

0.16%

higher than 6% of all CVEs

CISA assessment (SSVC)

Exploitation: none
Automatable: no
Technical impact: partial

Timeline

ID reserved2026-09-28
Published2026-10-08 21:47
Reached IP-DB2026-10-24 23:46
Last updated2026-10-08 23:46

Assigned by (CNA): Docker
NVD status: Awaiting Analysis

View at source: CVE.org · NVD

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