CVE-2026-54247
Published:July 17, 2026
Updated:August 27, 2026
The Kubernetes admission webhook handler reads the entire request body using "io.ReadAll(r.Body)" without any size limit. Any client that can reach the webhook port within the cluster can send a multi-GB payload, causing the skipper process to exhaust memory and be OOM-killed. This disrupts all Kubernetes admission control, potentially blocking all pod creation and updates.
Affected Packages
https://github.com/zalando/skipper.git (GITHUB):
Affected version(s) >=v0.10.0 <v0.26.22Fix Suggestion:
Update to version v0.26.22github.com/zalando/skipper (GO):
Affected version(s) >=v0.0.0-20161216123113-c077837371b2 <v0.26.22Fix Suggestion:
Update to version v0.26.22Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Allocation of Resources Without Limits or Throttling