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Flannel has cross-node remote code execution via extension backend BackendData injection

🗓️ 27 Mar 2026 20:28:13Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 3 Views

Flannel Extension backend permits root command execution via attacker-controlled Node annotations; fixed in v0.28.2.

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27 Mar 2026 21:48Current
6.2Medium risk
Vulners AI Score6.2
CVSS 3.17.5 - 8.8
EPSS0.00057
SSVC
3