CVE-2025-59531Public exploitNetwork attack vector

API server crash via unchecked webhook type assertion

Published Oct 1, 2025 · Updated Oct 2, 2025

Denial of service in affected Argo CD releases allows remote attackers to crash the API server via a malformed Bitbucket Server webhook. affectedRevisionInfo treats repository.links.clone as an array with an unchecked Go type assertion, and the worker has no panic recovery. When the Bitbucket Server webhook secret is unset, one unauthenticated request restarts a replica; requests to every replica interrupt the API.

CVSS severity7.5
High
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in affected Argo CD releases allows remote attackers to crash the API server via a malformed Bitbucket Server webhook. affectedRevisionInfo treats repository.links.clone as an array with an unchecked Go type assertion, and the worker has no panic recovery. When the Bitbucket Server webhook secret is unset, one unauthenticated request restarts a replica; requests to every replica interrupt the API.

The record

CVE
CVE-2025-59531
Published
Oct 1, 2025
Updated
Oct 2, 2025
Vendor
Argo Project
Product
Argo CD
Classifications
CWE-703, 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

7.5GitHub Security AdvisoryCVSS: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-703Improper Check or Handling of Exceptional Conditions
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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