CVE-2026-61711: BuildKit Custom Frontend Could Bypass Seccomp/AppArmor Vulnerability

MODERATE
Advisory Identifier: GHSA-7236-3392-c5c6
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CWE-20
Published
Advisory Summary

CVE-2026-61711 is a MODERATE custom frontend could bypass seccomp/apparmor vulnerability (CWE-20: Improper Input Validation) affecting BuildKit libraries in the Go ecosystem. The issue involves custom frontend could bypass seccomp/apparmor. Remediation is available by upgrading affected packages to version 0.31.1.

CVE-2026-61711 at a Glance

CVE Identifier CVE-2026-61711
GHSA Identifier GHSA-7236-3392-c5c6
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-20: Improper Input Validation
Affected Product BuildKit
Package Ecosystem Go
Published Date
Last Updated

How to Fix CVE-2026-61711

To remediate this vulnerability, upgrade all affected BuildKit dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/moby/buildkit fixed: 0.31.1 
Upgrade github.com/moby/buildkit to 0.31.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/moby/buildkit

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-61711, inspect your project dependencies for BuildKit:

inspect dependencies for github.com/moby/buildkit

Analyze the terminal output to locate any version of BuildKit in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.31.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In BuildKit, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact A custom frontend could send a crafted build request that disabled Seccomp and AppArmor protections for the build container, even if the user did not explicitly allow the `security.insecure` entitlement. Other security measures, like Linux capabilities were still applied to these containers. ### Patches Problem has been fixed in versions v0.31.1+ ### Workarounds Only use BuildKit frontends from trusted providers.

CVE-2026-61711 Affected BuildKit Versions

1 component(s)
Fixed Versions:
0.31.1
Product / Package Ecosystem Affected Versions Fixed Version
github.com/moby/buildkit
golang/github.com/moby/buildkit
Go
< 0.31.1
0.31.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/moby/buildkit/security/advisories/GHSA-7236-3392-c5c6
BuildKit Source Repository REPOSITORY
https://github.com/moby/buildkit

Frequently Asked Questions

What is CVE-2026-61711?
CVE-2026-61711 is a security vulnerability in BuildKit involving Custom frontend could bypass Seccomp/AppArmor under CWE-20: Improper Input Validation.
Which BuildKit versions are affected?
Affected versions include releases prior to 0.31.1 across affected packages: github.com/moby/buildkit.
What version fixes CVE-2026-61711?
Upgrading to 0.31.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/moby/buildkit affected?
Yes, github.com/moby/buildkit is affected in releases prior to 0.31.1. Upgrade your dependency to 0.31.1 or later.
What CWE is associated with CVE-2026-61711?
CVE-2026-61711 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check Go dependencies for CVE-2026-61711?
Run the dependency tree command: 'inspect dependencies for github.com/moby/buildkit'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-7236-3392-c5c6",
  "modified" : "2026-08-19T20:23:50Z",
  "published" : "2026-08-19T20:23:50Z",
  "aliases" : [ "CVE-2026-61711" ],
  "summary" : "BuildKit: Custom frontend could bypass Seccomp/AppArmor",
  "details" : "### Impact\nA custom frontend could send a crafted build request that disabled Seccomp and AppArmor protections for the build container, even if the user did not explicitly allow the `security.insecure` entitlement. Other security measures, like Linux capabilities were still applied to these containers.\n\n### Patches\nProblem has been fixed in versions v0.31.1+\n\n### Workarounds\nOnly use BuildKit frontends from trusted providers.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/moby/buildkit"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.31.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.31.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/moby/buildkit/security/advisories/GHSA-7236-3392-c5c6"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/moby/buildkit"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-19T20:23:50Z",
    "nvd_published_at" : null
  }
}