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CVE-2026-61711— BuildKit: Custom frontend could bypass Seccomp/AppArmor

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.

Moby BuildKit是Moby团队开源的一款容器镜像构建引擎。 Moby BuildKit 0.31.1之前版本存在输入验证错误漏洞，该漏洞源于自定义前端可在特制构建请求中放置无效的SecurityMode值，executor/oci/spec_linux.go将不支持的值视为非沙箱模式，无需security.insecure授权，导致禁用Seccomp和AppArmor保护。

CVSS 5.3 · Medium EPSS 0.36% · P29

Possible ATT&CK Techniques 1 AI

T1610 · Deploy Container

Affected Version Matrix 1

VendorProduct Version RangeStatus
moby buildkit < 0.31.1 affected
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I. Basic Information for CVE-2026-61711

Vulnerability Information
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Vulnerability Title
BuildKit: Custom frontend could bypass Seccomp/AppArmor
Source: CVE Program / CVE List V5
Vulnerability Description
BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to 0.31.1, a custom frontend could place an invalid SecurityMode value in a crafted build request, and executor/oci/spec_linux.go treated the unsupported value as a non-sandbox mode without requiring the security.insecure entitlement. This disabled Seccomp and AppArmor protections for the build container even though Linux capabilities remained restricted. This issue is fixed in version 0.31.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Moby BuildKit 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Moby BuildKit是Moby团队开源的一款容器镜像构建引擎。 Moby BuildKit 0.31.1之前版本存在输入验证错误漏洞，该漏洞源于自定义前端可在特制构建请求中放置无效的SecurityMode值，executor/oci/spec_linux.go将不支持的值视为非沙箱模式，无需security.insecure授权，导致禁用Seccomp和AppArmor保护。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
moby buildkit < 0.31.1 -

II. Public POCs for CVE-2026-61711

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III. Intelligence Information for CVE-2026-61711

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Patches & Fixes for CVE-2026-61711 (2)

Vendor Advisories for CVE-2026-61711 (1)

Other References for CVE-2026-61711 (1)

Same Patch Batch · moby · 2026-08-19 · 3 CVEs total

CVE-2026-75593 7.2 HIGH BuildKit: Malicious client can bypass destination directory validation on local sources up
CVE-2026-61712 2.3 LOW BuildKit: Possible runtime DoS via unbounded group parsing

IV. Related Vulnerabilities

Same product: buildkit
Same vendor: moby
Same weakness: CWE-20

V. Comments for CVE-2026-61711

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