Vulnerability · Published Sep 1, 2026 · Assigned by VulnCheck

CVE-2023-54356Kyverno before 1.9.5 Sweet32 Medium Strength Cipher Suites

Low 3.7

In plain English

A low-severity security flaw in kyverno from kyverno. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.7Low

Exploit odds (30 days)0.2%top 90.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/kyverno/kyverno	1.9.5	GHSA-hgv6-w7r3-w4qw
Go	github.com/kyverno/kyverno	1.9.5	GO-2023-1804

Affected products (as reported)

Vendor	Product	Versions
kyverno	kyverno	0 – before 1.9.5, 1.10.0

Weakness: CWE-326 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

References

GitHub Security Advisory (GHSA-hgv6-w7r3-w4qw) vendor-advisory
VulnCheck Advisory: Kyverno before 1.9.5 Sweet32 Medium Strength Cipher Suites third-party-advisory