CVE-2026-43824
Description
A flaw was found in Argo CD. The ServerSideDiff feature allows for the reading of cleartext Kubernetes Secret data. This vulnerability could lead to information disclosure, potentially exposing sensitive configuration details within the Kubernetes environment.
Statement
This is an Important information disclosure flaw in Argo CD, as deployed in Red Hat OpenShift GitOps. The ServerSideDiff feature allows for the reading of cleartext Kubernetes Secret data, which could expose sensitive configuration details. This is considered Important due to the potential for unauthorized access to critical credentials and sensitive information within the Kubernetes environment.
This vulnerability affects only applications which are deployed with the argocd.argoproj.io/compare-options: IncludeMutationWebhook=true annotation. To a successful attack take place the attacker requires only the accesses needed to successfully call the ServerSideDiff function and the secret the attacker is trying to exfiltrate needs to be owned by at least one non-ArgoCD SSA field manager, otherwise the value will be garbage collected and won't be present in the response.
The Red Hat GitOps containers marked as not affected in the affects table doesn't ship the vulnerable ArgoCD version on, being older than the upstream version which introduced the vulnerability or the container is already updated to a patched version of ArgoCD.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 9.6 | N/A | 9.6 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Changed | N/A | Changed |
| Confidentiality | High | N/A | High |
| Integrity Impact | High | N/A | High |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Application Data
An attacker with access to the system could read sensitive information stored in cleartext (i.e., unencrypted). Even if the information is encoded in a way that is not human-readable, certain techniques could determine which encoding is being used, then decode the information.
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