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CVE-2026-58440 Webhooks created by a collaborator keep firing after their repo access is revoked → ongoing real-time exfiltration of private repo content (incomplete revocation cleanup in `DeleteCollaboration`)

🗓️ 13 Aug 2026 16:44:54Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 5 Views

GitHub webhooks keep firing after collaborator access revoked, exfiltrating private repo content via incomplete DeleteCollaboration cleanup.

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16 Aug 2026 03:31Current
5.3Medium risk
Vulners AI Score5.3
CVSS 3.16.8
5