CVE-2026-101998

MEDIUM 5.9

Published 2026-10-08 · Last modified 2026-10-08

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.

NO EXPLOITATION SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.2%chance of exploitation in 30 days · 5th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

5.9CVSS 4.0 · MEDIUM

ConfidentialityHigh
IntegrityNone
AvailabilityNone

What an attacker needs

⚠Access: Must sit on the same / adjacent network
⚠Privileges: Requires a low-privilege account
✓User interaction: No user interaction needed
✓Complexity: No special conditions — reliably repeatable
⚠Requirements: Specific conditions must be present

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot: 2026-10-26T13:52:32.101Z

Affected

Vendors Docker

Products Docker Sandboxes

Weakness (CWE)

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

CVSS vector

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

References and research data (JSON)

All CVSS metrics

MEDIUM 5.9 v4.0 · CNA Primary
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
MEDIUM 5.9 v4.0 · NVD Secondary
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

References

Advisories

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-95157 ADVISORYEUVD · EUVD-2026-95157

Technical & other

https://docs.docker.com/ai/sandboxes/ productCVE record · Docker · Updated 2026-10-08T18:47:28.551Z
NVD · CVE-2026-101998 · Updated 2026-10-08T20:46:35.260
https://docs.docker.com/ai/sandboxes/configuration/credentials/#how-credential-injection-works technical-descriptionCVE record · Docker · Updated 2026-10-08T18:47:28.551Z
NVD · CVE-2026-101998 · Updated 2026-10-08T20:46:35.260

Sources: NVD · CVE.org · EPSS