CVE-2026-93320

BuildKit improperly handles special files in build snapshots

CVE-2026-93320 is fixed in 4 products on 1 platform, first by ALAS2023-2026-3266, released November 7, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

n/a

Moderate

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0011

1st percentile

BuildKit may be tricked into performing file actions with special file inodes where regular files are expected. Special files may block operations or, on rootful workers, allow unintended host device access.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
docker · amzn 2023	25.0.18-1.amzn2023.0.1	ALAS2023-2026-3266	Nov 7, 2026
docker-debuginfo · amzn 2023	25.0.18-1.amzn2023.0.1	ALAS2023-2026-3266	Nov 7, 2026
docker-debugsource · amzn 2023	25.0.18-1.amzn2023.0.1	ALAS2023-2026-3266	Nov 7, 2026
runfinch-finch · amzn 2023	1.19.0-1.amzn2023.0.2	ALAS2023-2026-3264	Nov 7, 2026

Details

Published
October 9, 2026
Weakness
Unintended Proxy or Intermediary ('Confused Deputy')
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-93320

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