What is CVE-2026-122322?

CVE-2026-122322 is a high-severity vulnerability in Kyverno, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 7.5/10. Published 2026-11-05.

How severe is CVE-2026-122322?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Kyverno

CVE-2026-122322

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.

Published 2026-11-05 · last modified 2026-11-05.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Kyverno

Weakness classification (CWE)

CWE-409 — Improper Handling of Highly Compressed Data (Data Amplification)

References

GitHub Security Advisory (GHSA-3f2c-hfj8-542w) (vendor-advisory)
VulnCheck Advisory: Kyverno from 1.11.0 before 1.19.2 Memory Exhaustion via Notary Attestation Decompression (third-party-advisory)

Frequently asked questions

What is CVE-2026-122322?: CVE-2026-122322 is a high-severity vulnerability in Kyverno, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 7.5/10. Published 2026-11-05.
How severe is CVE-2026-122322?: High severity. CVSS v3 base score is 7.5 out of 10.