---
title: "CVE-2026-79993: Apache ZooKeeper - Authorization Bypass"
description: "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."
url: https://panop.io/threat-heartbeat/CVE-2026-79993/
---

# 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 ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-79993)

## 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](https://cwe.mitre.org/data/definitions/862.html)

## 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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-79993](https://nvd.nist.gov/vuln/detail/CVE-2026-79993)
- [https://lists.apache.org/thread/9cw3rmrzhqpct26v8j18fy41bghlq8y5](https://lists.apache.org/thread/9cw3rmrzhqpct26v8j18fy41bghlq8y5)
- [http://www.openwall.com/lists/oss-security/2026/09/15/5](http://www.openwall.com/lists/oss-security/2026/09/15/5)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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