CVE-2026-45738Public exploitNetwork attack vector

Developer-to-admin escalation via unvalidated application links

Published Jul 15, 2026 · Updated Jul 15, 2026

Stored XSS in Argo CD before 3.2.12, 3.3.0 through 3.3.9, and 3.4.0-rc1 through 3.4.1 allows remote authenticated users to hijack admin sessions. ApplicationSummary splits annotation values at | and assigns the second segment to an anchor href without isValidURL(), accepting javascript: URIs. Application write access and a higher-privileged user's click are required; the script runs in the authenticated Argo CD origin and can read or alter API data.

CVSS severity7.3
High
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Argo CD before 3.2.12, 3.3.0 through 3.3.9, and 3.4.0-rc1 through 3.4.1 allows remote authenticated users to hijack admin sessions. ApplicationSummary splits annotation values at | and assigns the second segment to an anchor href without isValidURL(), accepting javascript: URIs. Application write access and a higher-privileged user's click are required; the script runs in the authenticated Argo CD origin and can read or alter API data.

The record

CVE
CVE-2026-45738
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
Argo Project
Product
Argo CD
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 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=< 3.2.12
  2. Affected versionversion=>= 3.3.0, < 3.3.10
  3. Affected versionversion=>= 3.4.0-rc1, < 3.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Argo Project · Argo CDversion=< 3.2.12; version=>= 3.3.0, < 3.3.10; version=>= 3.4.0-rc1, < 3.4.2

Published CVSS scores

7.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
8.7NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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