CVE-2026-122323
Published:November 05, 2026
Updated:November 05, 2026
Kyverno from 1.11.0 before 1.19.2 contains an unbounded decompression vulnerability in FetchSignatureBlob that allows attackers to exhaust memory by supplying highly compressed notary signature layers. Attackers who control registry referrers or signatures can publish small gzip layers that decompress beyond maxPayloadSize, causing admission controller OOM kills and denial of service.
Affected Packages
https://github.com/kyverno/kyverno.git (GITHUB):
Affected version(s) >=v1.11.0-beta.1 <v1.19.2Fix Suggestion:
Update to version v1.19.2github.com/kyverno/kyverno (GO):
Affected version(s) >=v1.11.0-beta.1 <v1.19.2Fix Suggestion:
Update to version v1.19.2Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Improper Handling of Highly Compressed Data (Data Amplification)