Vulnerability in Kyverno
CVE-2023-54356
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.001 (3.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 3.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/kyverno/kyverno/security/advisories/GHSA-hgv6-w7r3-w4qw (vendor-advisory)
- www.vulncheck.com/advisories/kyverno-before-1.9.5-sweet32-medium-strength-ciphe… (third-party-advisory)
Frequently asked questions
- What is CVE-2023-54356?
- CVE-2023-54356 is a low-severity vulnerability in Kyverno, classified under Inadequate Encryption Strength. CVSS score: 3.7/10. Published 2026-09-01.
- How severe is CVE-2023-54356?
- Low severity. CVSS v3 base score is 3.7 out of 10.