8.1

CVE-2026-33997: Moby: Off-by-one error in plugin privilege validation

Modified
AliasesUBUNTU-CVE-2026-33997DEBIAN-CVE-2026-33997CGA-25x4-gv7j-mh2v
Published 31-03-2026Last modified 09-09-2026

Vulnerability summary

CVE-2026-33997 is a high (CVSS 8.1) Off-by-one Error vulnerability in docker engine. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 34.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.8, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.1/10
010
High · v3.1 (NVD)
EPSS score
0.40%
0%100%
Low · -0.11 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 7
OPENSUSE-SU-2026:11075-1OPENSUSE-SU-2026:21205-1OPENSUSE-SU-2026:21483-1SUSE-SU-2026:1205-1SUSE-SU-2026:2578-1SUSE-SU-2026:2579-1

Timeline

  1. 31-03-2026
    PublishedVulnerability first disclosed.
  2. 09-09-2026
    Last modifiedVulnerability information updated.

Description

Moby is an open source container framework. Prior to version 29.3.1, a security vulnerability has been detected that allows plugins privilege validation to be bypassed during docker plugin install. Due to an error in the daemon's privilege comparison logic, the daemon may incorrectly accept a privilege set that differs from the one approved by the user. Plugins that request exactly one privilege are also affected, because no comparison is performed at all. This issue has been patched in version 29.3.1.

CVSS metrics

8 scores · 8 sources · 1 version

EPSS trend

Probability

0.40%

Chance of exploitation in the next 30 days

Percentile

34%

Versus all other CVEs

30-day change

Decrease -0.11 pp

From 0.51% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard199 products
  • agentbeatAll versions (No fix recorded)
  • agentbeat-fipsAll versions (No fix recorded)
  • amazon-cloudwatch-agent< 1.300074.0-r0
  • amazon-cloudwatch-agent-fips< 1.300074.0-r0
  • amazon-cloudwatch-agent-operator< 3.6.0-r0
Alpine1 product
  • docker< 29.3.1-r0

2 vendors · 200 products · Showing 200 of 808

References

17 links
Show all 17 references