CVE-2026-42880Public exploitNetwork attack vector

Secret disclosure via unmasked ServerSideDiff states

Published May 7, 2026 · Updated May 7, 2026

Information disclosure in Argo CD 3.2.0 through 3.2.10 and 3.3.0 through 3.3.8 allows remote authenticated users to read Kubernetes Secrets. The ServerSideDiff handler returns raw PredictedLive and NormalizedLive states without hideSecretData() when IncludeMutationWebhook=true bypasses mutation removal. Read-only application get permission is sufficient when another SSA field manager owns the Secret data.

CVSS severity9.6
Critical
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Argo CD 3.2.0 through 3.2.10 and 3.3.0 through 3.3.8 allows remote authenticated users to read Kubernetes Secrets. The ServerSideDiff handler returns raw PredictedLive and NormalizedLive states without hideSecretData() when IncludeMutationWebhook=true bypasses mutation removal. Read-only application get permission is sufficient when another SSA field manager owns the Secret data.

The record

CVE
CVE-2026-42880
Published
May 7, 2026
Updated
May 7, 2026
Vendor
Argo Project
Product
Argo CD
Classifications
CWE-200, CWE-212, T1552.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 7, 2026CVE publishedPublication date reported by the CVE source.
  2. May 7, 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=>= 3.2.0, < 3.2.11
  2. Affected versionversion=>= 3.3.0, < 3.3.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Argo Project · Argo CDversion=>= 3.2.0, < 3.2.11; version=>= 3.3.0, < 3.3.9

Published CVSS scores

7.7Red HatCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
9.6GitHub CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/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-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-212Improper Removal of Sensitive Information Before Storage or Transfer
T1552.007Unsecured Credentials: Container API

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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