CVE-2026-122322 PUBLISHED

Kyverno from 1.11.0 before 1.19.2 Memory Exhaustion via Notary Attestation Decompression

Assigner: VulnCheck
Reserved: 04.11.2026 Published: 05.11.2026 Updated: 05.11.2026

Kyverno from 1.11.0 before 1.19.2 contains an unbounded decompression vulnerability in extractStatement that allows remote attackers to exhaust memory by supplying highly compressed attestation layers. Attackers controlling registry referrer artifacts can push gzip predicate layers exceeding maxPayloadSize when decompressed, causing admission controller OOM kills and denial of service.

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS Score: 8.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 7.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	kyverno
Product	kyverno
Versions	Default: unaffected affected from 1.11.0 to 1.19.2 (excl.) Version 1.19.2 is unaffected

CVE-2026-122322 PUBLISHED

Kyverno from 1.11.0 before 1.19.2 Memory Exhaustion via Notary Attestation Decompression

Metrics

Product Status

Credits

References

Problem Types