AuthZ plugin bypass with oversized request body

F-MOBY-001-001

Public snapshot: 26 Sep 2026. Status, releases and attribution belong to each source below; none is inferred from another record.

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Recorded evidence

8.8high

CVE-2026-34040CVEmoby/moby

AuthZ plugin bypass with oversized request body

Upstream fixed versions: Docker Engine: 29.3.1

patched

details

Finding IDs: F-MOBY-001-001
CVE: CVE-2026-34040
GHSA: GHSA-x744-4wpc-v9h2
Status: patched
Fixed in: Docker Engine: 29.3.1
Recorded credit: 1seal / Oleh Konko (@1seal)
Note: GHSA-x744-4wpc-v9h2
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVE registry state: PUBLISHED
CVE state checked: 23 Sep 2026
Upstream title: AuthZ plugin bypass with oversized request body
Upstream publication: 25 Mar 2026
Upstream updated: 27 Mar 2026
Metadata fetched: 23 Sep 2026
Upstream fixed versions: Docker Engine: 29.3.1
Upstream affected ranges: Docker Engine: < 29.3.1
Upstream @1seal credit: @1seal: reporter (accepted)

F-MOBY-001-001: Access control. An oversized request body bypasses the authorization plugin decision. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-MOBY-001-001

Security area (1seal assessment): Authorization. An oversized request body bypasses the authorization plugin decision. Reviewed 24 Sep 2026.

—score not recorded

moby/mobyReported fixmoby/moby

pkg/authz: Reject requests exceeding body size limit

fixed publicly

details

Finding IDs: F-MOBY-001-001
Status: fixed publicly
Reported via: security contact
Note: public fix commit 7a767b27fd12 appears to address the reported issue. GHSA-x744-4wpc-v9h2 / CVE-2026-34040 published with credit to 1seal / Oleh Konko.

F-MOBY-001-001: Access control. An oversized request body bypasses the authorization plugin decision. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-MOBY-001-001

Security area (1seal assessment): Authorization. An oversized request body bypasses the authorization plugin decision. Reviewed 24 Sep 2026.

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