CVE-2026-79993 Apache ZooKeeper - Authorization Bypass

Apache ZooKeeper 3.8.0 through 3.8.6 and 3.9.0 through 3.9.5 contain an authorization bypass caused by the deleteContainer opcode (0x14) processing without ACL verification, letting authenticated clients delete specific znodes regardless of ACL restrictions, exploit requires ability to open a plain TCP session on the client port.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.60% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authorization Bypass
Impact
Broken Access Control, Data Tampering, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published
16 September 2026
Updated
15 October 2026
Weakness
CWE-862

Vendor fix

Upgrade to version 3.9.6 or 3.8.7.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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