CVE-2025-59537Public exploitNetwork attack vector

Unauthenticated service crash via nil Gogs repository

Published Oct 1, 2025 · Updated Oct 2, 2025

Improper input validation in affected Argo CD versions allows remote attackers to crash argocd-server through a Gogs webhook. The webhook Handler accepts loosely matched JSON, and affectedRevisionInfo dereferences a nil PushPayload.Repo while processing the attacker-controlled event. The unauthenticated endpoint is exposed when webhook.gogs.secret is unset, and repeated requests can interrupt service for legitimate clients.

CVSS severity7.5
High
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in affected Argo CD versions allows remote attackers to crash argocd-server through a Gogs webhook. The webhook Handler accepts loosely matched JSON, and affectedRevisionInfo dereferences a nil PushPayload.Repo while processing the attacker-controlled event. The unauthenticated endpoint is exposed when webhook.gogs.secret is unset, and repeated requests can interrupt service for legitimate clients.

The record

CVE
CVE-2025-59537
Published
Oct 1, 2025
Updated
Oct 2, 2025
Vendor
Argo Project
Product
Argo CD
Classifications
CWE-20, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 2, 2025Record 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=>= 1.2.0, <= 1.8.7
  2. Affected versionversion=>= 2.0.0-rc1, < 2.14.20
  3. Affected versionversion=>= 3.0.0-rc1, < 3.0.19
  4. Affected versionversion=>= 3.1.0-rc1, < 3.1.8
  5. Affected versionversion=>= 3.2.0-rc1, < 3.2.0-rc2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Argo Project · Argo CDversion=>= 1.2.0, <= 1.8.7; version=>= 2.0.0-rc1, < 2.14.20; version=>= 3.0.0-rc1, < 3.0.19; version=>= 3.1.0-rc1, < 3.1.8; version=>= 3.2.0-rc1, < 3.2.0-rc2

Published CVSS scores

7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499.004Application or System Exploitation

Public exploit references

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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