Kubernetes: Previously, DecodeElement would reset the depth counter causing it to never fire; this could lead to stack
Affects kubernetesSource GCVE Database
Not known to be exploited · CVSS 7.5 High : upgrade to 1.34.13-r2 soon.
Data as of 11 Nov 2026, 04:03 UTC
- Patch
- Available – fixed in 1.34.13-r2, 4.1.6-r1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 13 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.
What to do
Upgrade kubernetes to 1.34.13-r2; argo-workflows to 4.1.6-r1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
CleanStartkubernetespkg:apk/cleanstart/kubernetesOther threats | Affected
| Fixed in
|
CleanStartargo-workflowspkg:apk/cleanstart/argo-workflowsOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A patch is available and should be applied by upgrading to Kubernetes versions 1.34.13-r2 or 4.1.6-r1 or later. No additional mitigations are indicated by the vendor advisory.
Description
CVE-2026-56859 is a high-severity vulnerability in Kubernetes where the DecodeElement function previously reset the depth counter incorrectly, preventing it from firing as intended. This flaw could lead to stack exhaustion, potentially causing denial of service. Fixed versions 1.34.13-r2 and 4.1.6-r1 address this issue.