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CVE-2026-93319— A malicious frontend can cause a daemon panic

Quick assessment

Affected
moby BuildKit
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

恶意的外部 BuildKit 前端可以使用内部 API 发送请求，从而创建可能导致数据竞争的条件，使 BuildKit 守护进程发生恐慌。

CVSS 5.7 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
moby BuildKit ≤ 0.33.0 affected
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I. Basic Information for CVE-2026-93319

Vulnerability Information
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Vulnerability Title
A malicious frontend can cause a daemon panic
Source: CVE Program / CVE List V5
Vulnerability Description
A malicious external BuildKit frontend can send requests using the internal API that can create conditions for a data race that can cause the BuildKit daemon to panic.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在多现场上下文中未能对共享数据进行同步访问
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
moby BuildKit 0 ~ 0.33.0 -

II. Public POCs for CVE-2026-93319

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-93319

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Vendor Advisories for CVE-2026-93319 (1)

Vendor Pages for CVE-2026-93319 (1)

Same Patch Batch · moby · 2026-10-05 · 9 CVEs total

CVE-2026-93318 7.5 HIGH Cache poisoning via unvalidated image layer DiffIDs
CVE-2026-93316 7.1 HIGH Starting daemon with --cdi-disabled flag can lead to panic on specific builds
CVE-2026-93322 6.9 MEDIUM Malformed MergeOp can crash the BuildKit daemon
CVE-2026-93323 6.8 MEDIUM Oversized Dockerfile or .dockerignore can exhaust buildkitd memory
CVE-2026-93320 6.0 MEDIUM BuildKit improperly handles special files in build snapshots
CVE-2026-93326 6.0 MEDIUM Crafted Git build source can bypass certain policy validation
CVE-2026-93317 5.9 MEDIUM Container blob cache can accept unverified content
CVE-2026-93315 5.8 MEDIUM BuildKit proxy CA cleanup can be disrupted by build steps

IV. Related Vulnerabilities

Same product: BuildKit
Same vendor: moby
Same weakness: CWE-567

V. Comments for CVE-2026-93319

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