CVE-2024-21652Public exploitNetwork attack vector

Unauthenticated login throttling bypass via server restart

Published Mar 18, 2024 · Updated Aug 1, 2024

Argo CD before 2.8.13, 2.9.0 through 2.9.8, and 2.10.0 through 2.10.3 allows remote attackers to bypass login throttling. Failed-login counters exist only in process memory, while an unsafe concurrent array modification can crash the server; the ensuing restart erases those counters. Unauthenticated network access is sufficient to interrupt the service and resume password guessing, but account compromise still requires guessing valid credentials.

CVSS severity9.8
Critical
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Argo CD before 2.8.13, 2.9.0 through 2.9.8, and 2.10.0 through 2.10.3 allows remote attackers to bypass login throttling. Failed-login counters exist only in process memory, while an unsafe concurrent array modification can crash the server; the ensuing restart erases those counters. Unauthenticated network access is sufficient to interrupt the service and resume password guessing, but account compromise still requires guessing valid credentials.

The record

CVE
CVE-2024-21652
Published
Mar 18, 2024
Updated
Aug 1, 2024
Vendor
Argo Project
Product
Argo CD
Classifications
CWE-307, T1499, T1110
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2024Record 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=0 <2.8.13
  2. Affected versionversion=>= 2.10.0, < 2.10.4
  3. Affected versionversion=2.10.0 <2.10.4
  4. Affected versionversion=< 2.8.13
  5. Affected versionversion=>= 2.9.0, < 2.9.9
  6. Affected versionversion=2.9.0 <2.9.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Argo Project · Argo CDversion=0 <2.8.13; version=>= 2.10.0, < 2.10.4; version=2.10.0 <2.10.4; version=< 2.8.13; version=>= 2.9.0, < 2.9.9; version=2.9.0 <2.9.9

Published CVSS scores

9.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.4Argo ProjectCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-307Improper Restriction of Excessive Authentication Attempts
T1499Endpoint Denial of Service
T1110Brute Force

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo