DockerCVE-2026-15789
Docker BuildKit: authentication bypass
Medium6.9CVE-2026-15789 · Published Jul 21, 2026 · updated Jul 30, 2026
A custom client can produce such an upload request to the BuildKit daemon that files can escape from the BuildKit-controlled state directory. The client needs to have valid permissions to access the BuildKit control API to issue builds, e.g., bypass authentication, etc.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| BuildKit Product | < 0.31.2 | 0.31.2 |
Details and references
- CVSS 4.0
- CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/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
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-22
More Docker advisories
All Docker| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Aug 18 | Docker CLI: link following | High7.1 | go-archive 0.3.0+4 more |
| Aug 12 | Docker Sandboxes: improper authorization | Medium5.7 | No fix yet |
| Jul 21 | Docker BuildKit: improper input validation | Medium6.0 | 0.31.2 |
| Jul 21 | Docker BuildKit: argument injection | High7.3 | No fix yet |
| Jul 21 | Docker BuildKit: path traversal | Low1.8 | 0.31.2 |
| Jul 20 | Docker BuildKit: link following | Medium5.6 | 0.31.2 |