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.
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Affected Vendors & Products
Advisories
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Fixes
Solution
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Workaround
No workaround given by the vendor.
References
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 |
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| Metrics |
cvssV3_1
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Projects
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MITRE
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-11-05T02:25:21.376Z
Reserved: 2026-11-04T23:26:08.934Z
Link: CVE-2026-122323
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
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Weaknesses