CVE-2026-34040
high
CVSS v3
—
CVSS v2
—
VIR risk
8.0
Description
Moby has AuthZ plugin bypass when provided oversized request bodies
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-34040.html
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-34040
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | affected | |
| debian | bullseye | affected | |
| debian | forky | affected | |
| debian | sid | fixed | 28.5.2+dfsg4-2 |
| debian | trixie | affected | |
| sles | affected | |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Go | github.com/moby/moby | <29.3.1 | 29.3.1 |
| Go | github.com/docker/docker | <29.3.1 | 29.3.1 |
| Go | github.com/moby/moby/v2 | <2.0.0-beta.8 | 2.0.0-beta.8 |
| Go | github.com/docker/docker | | |
| Go | github.com/moby/moby | | |
| GO | github.com/docker/docker | < 29.3.1 | 29.3.1 |
| GO | github.com/moby/moby | < 29.3.1 | 29.3.1 |
| GO | github.com/moby/moby/v2 | < 2.0.0-beta.8 | 2.0.0-beta.8 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| gcp | | |
References
- https://security-tracker.debian.org/tracker/CVE-2026-34040
- https://github.com/moby/moby/security/advisories/GHSA-v23v-6jw2-98fq
- https://github.com/moby/moby/security/advisories/GHSA-x744-4wpc-v9h2
- https://nvd.nist.gov/vuln/detail/CVE-2026-34040
- https://github.com/moby/moby/commit/e89edb19ad7de0407a5d31e3111cb01aa10b5a38
- https://docs.docker.com/engine/extend/plugins_authorization
- https://github.com/moby/moby
- https://github.com/moby/moby/releases/tag/docker-v29.3.1
- https://www.suse.com/security/cve/CVE-2026-34040.html
- https://github.com/advisories/GHSA-x744-4wpc-v9h2
Verify integrity in audit chain (admin only). AS-IS.