---
id: CVE-2026-93315
title: >-
  When proxy networking with CA injection is enabled, a build can modify its CA
  bundle before cleanup
summary: >-
  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.
severity: medium
cvss: 5.8
cvssVector: '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'
cwe:
  - CWE-367
vendor: moby
product: github.com/moby/buildkit
affected:
  - github.com/moby/buildkit >= 0.31.0 < 0.33.1
published: '2026-10-05'
updated: '2026-10-05'
sourceUpdated: '2026-10-05T22:16:58.820'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93315'
references:
  - url: 'https://github.com/moby/buildkit/releases/tag/v0.33.1'
    label: security@docker.com
  - url: 'https://github.com/moby/buildkit/security/advisories/GHSA-2f5p-x9ph-g97x'
    label: security@docker.com
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-10-05T22:35:24.740Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.