CVE-2026-33748Medium· 6.5▾ SunlitA flaw was found in BuildKit. Insufficient validation of Git URL fragment subdirectory components may allow a remote attacker to access files outside the checked-out Git repository root. This access is limited to files on the same mounted …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 35.8 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.5%
7.5 → 6.5
high → medium
Last analysed / modified upstream
0.5% → 0.5%
A flaw was found in BuildKit. Insufficient validation of Git URL fragment subdirectory components may allow a remote attacker to access files outside the checked-out Git repository root. This access is limited to files on the same mounted filesystem. This vulnerability could lead to unauthorized information disclosure.
github.com/moby/buildkit: BuildKit: Unauthorized file access via Git URL fragment subdir components — rated Moderate by Red Hat. Released 2026-03-27, updated 2026-10-09.
Affected:
Fixed:
No fix planned:
Not affected:
Before applying this update, make sure all previously released errata relevant to your system have been applied. https://access.redhat.com/errata/RHSA-2026:51033 Before applying this update, make sure all previously released errata relevant to your system have been applied. https://access.redhat.com/errata/RHSA-2026:29854 Before applying this update, make sure all previously released errata relevant to your system have been applied. https://access.redhat.com/errata/RHSA-2026:26568
Workarounds / mitigations:
Affected packages:
github.com/moby/buildkit < 0.28.1Patched in:
github.com/moby/buildkit 0.28.1Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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