7.8

CVE-2026-46680: containerd user ID handling bypass allows runAsNonRoot evasion

Analyzed
AliasesUBUNTU-CVE-2026-46680DEBIAN-CVE-2026-46680CGA-23h2-w9h8-c7fh
Published 01-07-2026Last modified 03-07-2026

Vulnerability summary

CVE-2026-46680 is a high (CVSS 7.8) Improper Privilege Management vulnerability in containerd. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.3, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.16%
0%100%
Low · 0.00 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 5 · Related 5

Timeline

  1. 01-07-2026
    PublishedVulnerability first disclosed.
  2. 03-07-2026
    Last modifiedVulnerability information updated.

Description

containerd is an open-source container runtime. In versions prior to 1.7.32, 2.0.9, 2.2.4 and 2.3.1, containers launched with a numeric User directive that cannot be parsed as a 32-bit integer are incorrectly treated as a username, leading to runAsNonRoot evasion. If a crafted image provides an /etc/passwd file mapping this large numeric string to root, the container ultimately runs as root (UID 0). This allows the Kubernetes runAsNonRoot restriction to be bypassed, causing unexpected behavior for environments that require containers to run as a non-root user. This issue has been fixed in versions 1.7.32, 2.0.9, 2.2.4 and 2.3.1.

CVSS metrics

11 scores · 8 sources · 2 versions

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.16% 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: local access, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard199 products
  • amazon-ecs-agent< 1.103.1-r2
  • amazon-ecs-agent-fips< 1.103.1-r2
  • auditbeat-7All versions (No fix recorded)
  • auditbeat-fips-7All versions (No fix recorded)
  • buildctl< 0.30.0-r1
Alpine1 product
  • containerd≥ 1.7.27, < 2.3.1-r0

2 vendors · 200 products · Showing 200 of 364

References

9 links