CVE-2024-48921Public exploit

ClusterPolicy bypass via unrestricted PolicyException namespaces

Published Oct 29, 2024 · Updated Oct 29, 2024

Authorization bypass in Kyverno before 1.13.0 allows remote authenticated users to override ClusterPolicies with PolicyException objects. The admission controller consumes PolicyException objects from every namespace without restricting exception lookup to a configured namespace, so an exception can suppress a named ClusterPolicy rule. Permission to create PolicyExceptions and workloads in a non-Kyverno namespace is required; a successful bypass can admit a privileged container and enable node-root access.

CVSS severity5.9
Medium
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Kyverno before 1.13.0 allows remote authenticated users to override ClusterPolicies with PolicyException objects. The admission controller consumes PolicyException objects from every namespace without restricting exception lookup to a configured namespace, so an exception can suppress a named ClusterPolicy rule. Permission to create PolicyExceptions and workloads in a non-Kyverno namespace is required; a successful bypass can admit a privileged container and enable node-root access.

The record

CVE
CVE-2024-48921
Published
Oct 29, 2024
Updated
Oct 29, 2024
Vendor
Kyverno
Product
Kyverno
Classifications
CWE-285, CWE-863, T1562.001
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 29, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 29, 2024Record 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 <1.13.0
  2. Affected versionversion=< 1.13.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Kyverno · Kyvernoversion=0 <1.13.0; version=< 1.13.0

Published CVSS scores

5.9Kyverno GitHub Security AdvisoryCVSS:4.0/AV:A/AC:H/AT:P/PR:H/UI:A/VC:H/VI:L/VA:L/SC:L/SI:H/SA:L
8.7GitHub, Inc. CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
2.7NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-285Improper Authorization
CWE-863Incorrect Authorization
T1562.001Impair Defenses: Disable or Modify Tools

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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