---
title: "CVE-2026-77459: Argo CD - Broken Access Control"
description: "Argo CD 2.10.0 to 3.3.15, 3.4.10, 3.5.4, and 3.6.0-rc2 contains a broken access control vulnerability caused by omission of AppProject destination and resource authorization checks in PostDelete resource hooks, letting users with write access to an Application's Git repository create unauthorized cluster-scoped or namespaced resources during deletion, exploit requires write access to the Application's Git repository."
url: https://panop.io/threat-heartbeat/CVE-2026-77459/
---

# CVE-2026-77459 Argo CD - Broken Access Control

Argo CD 2.10.0 to 3.3.15, 3.4.10, 3.5.4, and 3.6.0-rc2 contains a broken access control vulnerability caused by omission of AppProject destination and resource authorization checks in PostDelete resource hooks, letting users with write access to an Application's Git repository create unauthorized cluster-scoped or namespaced resources during deletion, exploit requires write access to the Application's Git repository.

CVSS base score 9.9 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.72% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-77459)

## Details

Type

Broken Access Control

Impact

Privilege Escalation, Data Tampering

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Published

13 October 2026

Updated

15 October 2026

Weakness

[CWE-863](https://cwe.mitre.org/data/definitions/863.html)

## Vendor fix

Update to versions 3.3.15, 3.4.10, 3.5.4, 3.6.0-rc2 or later.

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-2026-77459](https://nvd.nist.gov/vuln/detail/CVE-2026-77459)
- [https://github.com/argoproj/argo-cd/releases/tag/v3.5.4](https://github.com/argoproj/argo-cd/releases/tag/v3.5.4)
- [https://github.com/argoproj/argo-cd/releases/tag/v3.6.0-rc2](https://github.com/argoproj/argo-cd/releases/tag/v3.6.0-rc2)
- [https://github.com/argoproj/argo-cd/security/advisories/GHSA-fmxq-cgp8-87wp](https://github.com/argoproj/argo-cd/security/advisories/GHSA-fmxq-cgp8-87wp)
- [https://github.com/argoproj/argo-cd/commit/1149cdc6e932208c4402183cc3d7b7485239940c](https://github.com/argoproj/argo-cd/commit/1149cdc6e932208c4402183cc3d7b7485239940c)
- [https://github.com/argoproj/argo-cd/commit/4bc8085b0a6d2296b849539d3d09fc7be7a4a511](https://github.com/argoproj/argo-cd/commit/4bc8085b0a6d2296b849539d3d09fc7be7a4a511)
- [https://github.com/argoproj/argo-cd/commit/7f0a05834b05103d69d7c150e1ee36541b314696](https://github.com/argoproj/argo-cd/commit/7f0a05834b05103d69d7c150e1ee36541b314696)
- [https://github.com/argoproj/argo-cd/commit/d5dd7019ee65be8895133fe4df554e28074242c4](https://github.com/argoproj/argo-cd/commit/d5dd7019ee65be8895133fe4df554e28074242c4)
- [https://github.com/argoproj/argo-cd/releases/tag/v3.3.15](https://github.com/argoproj/argo-cd/releases/tag/v3.3.15)
- [https://github.com/argoproj/argo-cd/releases/tag/v3.4.10](https://github.com/argoproj/argo-cd/releases/tag/v3.4.10)

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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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