CVE-2026-77459Network attack vectorHinoki check available

Authorization bypass via unchecked delete-hook resource creation

Published Oct 13, 2026 · Updated Oct 13, 2026

Argo CD's delete-hook authorization bypass allows remote authenticated users to create forbidden resources via Git manifests. The application-controller creates PostDelete hooks, and PreDelete hooks where supported, without applying AppProject destination checks or resource allow/deny lists. Exploitation requires write access to an Application's Git repository and subsequent Application deletion; resource creation is bounded by the controller's destination-cluster permissions.

CVSS severity9.9
Critical
EPSS probability0.72%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Argo CD's delete-hook authorization bypass allows remote authenticated users to create forbidden resources via Git manifests. The application-controller creates PostDelete hooks, and PreDelete hooks where supported, without applying AppProject destination checks or resource allow/deny lists. Exploitation requires write access to an Application's Git repository and subsequent Application deletion; resource creation is bounded by the controller's destination-cluster permissions.

The record

CVE
CVE-2026-77459
Published
Oct 13, 2026
Updated
Oct 13, 2026
Vendor
Argo Project
Product
Argo CD
Classifications
CWE-863, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2.10.0, <= 2.14.21
  2. Affected versionversion=>= 3.0.0, < 3.3.15
  3. Affected versionversion=>= 3.4.0, < 3.4.10
  4. Affected versionversion=>= 3.5.0, < 3.5.4
  5. Affected versionversion=>= 3.6.0-rc1, < 3.6.0-rc2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Argo Project · Argo CDversion=>= 2.10.0, <= 2.14.21; version=>= 3.0.0, < 3.3.15; version=>= 3.4.0, < 3.4.10; version=>= 3.5.0, < 3.5.4; version=>= 3.6.0-rc1, < 3.6.0-rc2

Published CVSS scores

9.9GitHub CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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