CVE-2026-93320Hinoki check available

Host device access or hangs via special files

Published Oct 5, 2026 · Updated Oct 5, 2026

Special-file handling in Moby Project BuildKit 0.33.0 and earlier allows attackers to hang builds or access host devices via crafted build inputs. Daemon-side snapshot reads treat special-file inodes as regular files, while LLB mkfile operations fail to replace existing special files safely. An operator must run an untrusted build; blocking also affects rootless workers, while unintended host-device access requires a rootful worker.

CVSS severity6.0
Medium
EPSS probability0.11%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

Special-file handling in Moby Project BuildKit 0.33.0 and earlier allows attackers to hang builds or access host devices via crafted build inputs. Daemon-side snapshot reads treat special-file inodes as regular files, while LLB mkfile operations fail to replace existing special files safely. An operator must run an untrusted build; blocking also affects rootless workers, while unintended host-device access requires a rootful worker.

The record

CVE
CVE-2026-93320
Published
Oct 5, 2026
Updated
Oct 5, 2026
Vendor
Moby Project
Product
BuildKit
Classifications
CWE-441, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=0.33.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Moby Project · BuildKitversion=0 <=0.33.0

Published CVSS scores

6.0Moby ProjectCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-441Unintended Proxy or Intermediary ('Confused Deputy')
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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