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Vulnerability record · CVE-2026-93315 · published 5 October 2026

CVE-2026-93315: TOCTOU race condition vulnerability

When proxy networking with CA injection is enabled, a build can modify its CA bundle before cleanup. This may cause cleanup to block, operate outside the build rootfs, or fail without failing the build.

5.8 CVSS 4.0 Medium CWE-367 · TOCTOU race condition Received
5.8CVSS 4.0 base score
-EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
5 Oct 2026Last modified by NVD

Description

When proxy networking with CA injection is enabled, a build can modify its CA bundle before cleanup. This may cause cleanup to block, operate outside the build rootfs, or fail without failing the build.

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:L/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:

References

LinkTags
https://github.com/moby/buildkit/releases/tag/v0.33.1
https://github.com/moby/buildkit/security/advisories/GHSA-2f5p-x9ph-g97x

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-93315), CISA KEV, FIRST EPSS. This page is refreshed as NVD updates the record.