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CVE-2026-43824: In Argo CD 3.2.0 before 3.2.11 and 3.3.0 before 3.3.9, ServerSideDiff allows reading cleartext Kubernetes S...

In Argo CD 3.2.0 before 3.2.11 and 3.3.0 before 3.3.9, ServerSideDiff allows reading cleartext Kubernetes Secret data.

CriticalCVSS 9.6Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

This CVE affects Argo CD versions 3.2.0 before 3.2.11 and 3.3.0 before 3.3.9. A low-privileged authenticated user may be able to read Kubernetes Secret data in cleartext through ServerSideDiff, exposing credentials or tokens managed by deployments.

Executive priority

Treat this as urgent for any organization using affected Argo CD versions. Kubernetes Secrets often contain credentials that enable broader application or infrastructure compromise, and the vulnerability is rated critical with low attack complexity.

Technical view

The issue is a critical information exposure in Argo CD ServerSideDiff, mapped to CWE-212 and CWE-312. CVSS 3.1 is 9.6 with network access, low privileges, no user interaction, changed scope, high confidentiality and integrity impact, and no availability impact.

Likely exposure

Exposure is most likely in environments running affected Argo CD 3.2.x or 3.3.x releases where ServerSideDiff is available and users have authenticated access to Argo CD functionality.

Exploitation context

The provided sources do not state active exploitation, and KEV status is false. The CVSS vector indicates exploitation requires low privileges but no user interaction, so insider, compromised account, or over-permissioned user scenarios matter.

Researcher notes

Evidence supports affected version ranges, cleartext Kubernetes Secret exposure via ServerSideDiff, critical CVSS, and no KEV listing. The bundle does not provide exploit details or independent confirmation of active exploitation.

Mitigation direction

  • Upgrade Argo CD 3.2.x deployments to 3.2.11 or later.
  • Upgrade Argo CD 3.3.x deployments to 3.3.9 or later.
  • Review the upstream Argo CD advisory for any interim operational guidance.
  • Restrict Argo CD access to trusted users until upgraded.
  • Review exposed Kubernetes Secrets for possible credential rotation needs.

Validation and detection

  • Inventory Argo CD server versions across all clusters and environments.
  • Confirm no deployment runs 3.2.0 through 3.2.10.
  • Confirm no deployment runs 3.3.0 through 3.3.8.
  • Check whether ServerSideDiff is enabled or used in affected environments.
  • Audit Argo CD access logs for unusual secret-related activity where available.
Prepared
Confidence
high
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-212: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cwe · low confidence lookup

CWE-312: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
description · low confidence lookup

Credential and access behavior lookup

The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
description · low confidence lookup

Container behavior lookup

The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-43824 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.6 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
5Timeline events
2ADP providers
5Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: pocAutomatable: noTechnical Impact: partial

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
9.6CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N3.15.8redhat-SADP
7.7CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N3.14mitre

Vulnerability scoring details

Base CVSS 3.1 score

9.6Critical
CVSS 3.1 vector shape for CVE-2026-43824Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. ADP timelineredhat-SADP

    Made public.

  3. CVE publishedCVE Program

    The CVE record was published.

  4. ADP timelineredhat-SADP

    Reported to Red Hat.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
redhat-SADPgithub.com/argoproj/argo-cd/: Argo CD: Information disclosure via ServerSideDiff allows reading Kubernetes Secret data
other:Red Hat severity ratingcvssV3_1
  • 2026-05-02T02:00:52.099Z: Reported to Red Hat.
  • 2026-05-02T01:20:33.348Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
argoprojArgo CD3.2.0, 3.3.0unaffected
Weakness

CWE details

CWE-212CWE-312

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-212 · source CWE mapping

Improper Removal of Sensitive Information Before Storage or Transfer

Improper Removal of Sensitive Information Before Storage or Transfer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs
CWE-312 · source CWE mapping

Cleartext Storage of Sensitive Information

Cleartext Storage of Sensitive Information represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs