Description
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.
Published: 2026-11-05
Score: 8.7 High
EPSS: < 1% Very Low
KEV: No
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No solution or workaround provided in the CVE record.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Thu, 05 Nov 2026 02:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Kyverno 1.11.0 before 1.19.2 Memory Exhaustion via Notary Signature Decompression
First Time appeared Kyverno
Kyverno kyverno
Weaknesses CWE-409
CPEs cpe:2.3:a:kyverno:kyverno:*:*:*:*:*:*:*:*
Vendors & Products Kyverno
Kyverno kyverno
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-05T02:25:21.376Z

Reserved: 2026-11-04T23:26:08.934Z

Link: CVE-2026-122323

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-05T03:17:25.343

Modified: 2026-11-05T03:17:25.343

Link: CVE-2026-122323

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-05T03:45:17Z

Weaknesses