Answer in brief
CVE-2023-54356 records a Critical severity (CVSS 9.3) vulnerability in Kyverno before 1.9.5 Sweet32 Medium Strength Cipher Suites. The current sources do not mark it as known exploited. The current feed maps kyverno/kyverno (generic), github.com/kyverno/kyverno (go). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps kyverno/kyverno (generic), github.com/kyverno/kyverno (go). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| kyverno/kyvernogeneric | >=0 <1.9.5 1.10.0 | 1.9.5, 1.10.0, 1.9.5 |
| github.com/kyverno/kyvernogo | >=0 <1.9.5 | 1.9.5 |
Published upstream
Sep 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 1, 2026
Kyverno versions 1.9.4 and earlier support insecure 3DES cipher suites (TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA and TLS_RSA_WITH_3DES_EDE_CBC_SHA) on their TLS endpoints. These 64-bit block ciphers are vulnerable to the Sweet32 attack (CVE-2016-2183), which, over very long-lived TLS connections carrying large volumes of traffic, could allow an attacker to recover small amounts of plaintext. The issue is fixed in Kyverno 1.9.5 and 1.10.0.
Quoted source text, attributed separately from HOL analysis.