CVE-2026-122323

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    CVE-2026-122323

    Published: 5 Nov 2026Last Modified: 7 Nov 2026

    Summary: Kyverno 1.11.0 before 1.19.2 Memory Exhaustion via Notary Signature Decompression

    Details: 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.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/122xxx/CVE-2026-122323.json, https://github.com/kyverno/kyverno/security/advisories/GHSA-fr24-3hvf-393q, https://nvd.nist.gov/vuln/detail/CVE-2026-122323, https://www.vulncheck.com/advisories/kyverno-1.11.0-before-1.19.2-memory-exhaustion-via-notary-signature-decompression

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- a411fe6377afc165f31f251d119ab526f56fcfb6
    Fixed -e63308f1e16c05cd009ac4864be6ec25c66b49be

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-122323 | CVE-DB