CVE-2023-54356
Kyverno before 1.9.5 Sweet32 Medium Strength Cipher Suites
- State
- Published
- Severity
- 9.3 Critical
- Published
- Sep 1, 2026
- Updated
- Oct 8, 2026
- Reserved
- Jan 10, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 3.7 Low | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N | VulnCheck |
Weaknesses
- CWE-326 Inadequate Encryption Strength
Affected Products
| Product | Versions |
|---|---|
kyvernokyverno |
|
References
- GitHub Security Advisory (GHSA-hgv6-w7r3-w4qw)vendor-advisory
- VulnCheck Advisory: Kyverno before 1.9.5 Sweet32 Medium Strength Cipher Suitesthird-party-advisory
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