runfinch-finch: A crafted message in the BuildKit low-level build API can be used to remove the contents of the /tmp directory
CVE-2026-15791 is fixed in runfinch-finch on 1 platform by ALAS2023-2026-3140 (version 1.19.0-1.amzn2023.0.1), released September 28, 2026. It is not reported as exploited. Patch Radar priority: High.
A crafted message in the BuildKit low-level build API can be used to remove the contents of the /tmp directory. The action that can normally be used to delete files inside the build container rootfs can escape into the real host temp directory.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| runfinch-finch · amzn 2023 | 1.19.0-1.amzn2023.0.1 | ALAS2023-2026-3140 | Sep 28, 2026 |
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