CVE-2026-122323

High

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductKyverno

PublishedNov 5, 2026

First seenNov 5, 2026

Weakness typeCWE-409CWE-409

How to fix

Update

kyverno kyverno1.19.2 or later

Vendor advisories

github.com/kyverno/kyverno/security/advisories/GHSA-fr24-3hvf-393q

Affected products

Product	Affected versions	Fixed in
kyverno kyverno	1.11.0 ≤ v < 1.19.2	1.19.2

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.