CVE-2026-42880
ArgoCD ServerSideDiff is vulnerable to Kubernetes Secret Extraction
Description
Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. From versions 3.2.0 to before 3.2.11 and 3.3.0 to before 3.3.9, there is a missing authorization and data-masking gap in Argo CD's ServerSideDiff endpoint that allows an attacker with read-only access to extract plaintext Kubernetes Secret data from etcd via the Kubernetes API server's Server-Side Apply dry-run mechanism. This issue has been patched in versions 3.2.11 and 3.3.9.
INFO
Published Date :
May 7, 2026, 11:16 p.m.
Last Modified :
July 15, 2026, 2:21 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-42880
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 3.1 | HIGH | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c |
Solution
- Update Argo CD to version 3.2.11 or later.
- Update Argo CD to version 3.3.9 or later.
Public PoC/Exploit Available at Github
CVE-2026-42880 has a 3 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-42880.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-42880 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-42880
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Makefile Shell
None
Python Shell HTML
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-42880 vulnerability anywhere in the article.
-
The Hacker News
Unpatched Argo CD Repo-Server Flaw Could Let Attackers Take Over Kubernetes Clusters
Argo CD, a widely used tool for deploying software to Kubernetes, has an unpatched flaw in its repo-server component that lets an unauthenticated attacker run code, provided they can reach the compone ... Read more
The following table lists the changes that have been made to the
CVE-2026-42880 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Jul. 15, 2026
Action Type Old Value New Value Changed Affected [{'cpes': ['cpe:/a:redhat:openshift_gitops:1.19::el8'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps 1.19', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_gitops:1.20::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps 1.20', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_data_foundation:4'], 'vendor': 'Red Hat', 'product': 'Red Hat Openshift Data Foundation 4', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_gitops:1'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps', 'defaultStatus': 'unaffected'}] [{'cpes': ['cpe:/a:redhat:openshift_gitops:1.19::el8'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps 1.19', 'versions': [{'status': 'unaffected', 'version': '1779211412', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'openshift-gitops-1/argocd-image-updater-rhel8', 'collectionURL': 'https://catalog.redhat.com/software/containers/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_gitops:1.20::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps 1.20', 'versions': [{'status': 'unaffected', 'version': '1776942799', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'openshift-gitops-1/argocd-rhel9', 'collectionURL': 'https://catalog.redhat.com/software/containers/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_gitops:1.20::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps 1.20', 'versions': [{'status': 'unaffected', 'version': '1779285564', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'openshift-gitops-1/argocd-agent-rhel9', 'collectionURL': 'https://catalog.redhat.com/software/containers/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_gitops:1.20::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps 1.20', 'versions': [{'status': 'unaffected', 'version': '1779285074', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'openshift-gitops-1/argocd-image-updater-rhel9', 'collectionURL': 'https://catalog.redhat.com/software/containers/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_gitops:1.20::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps 1.20', 'versions': [{'status': 'unaffected', 'version': '1779284685', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'openshift-gitops-1/gitops-rhel9-operator', 'collectionURL': 'https://catalog.redhat.com/software/containers/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_data_foundation:4'], 'vendor': 'Red Hat', 'product': 'Red Hat Openshift Data Foundation 4', 'packageName': 'odf4/odf-multicluster-rhel9-operator', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_gitops:1'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps', 'packageName': 'openshift-gitops-1/argocd-agent-rhel8', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:openshift_gitops:1'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps', 'packageName': 'openshift-gitops-1/argocd-rhel8', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:openshift_gitops:1'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps', 'packageName': 'openshift-gitops-1/gitops-rhel8', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:openshift_gitops:1'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps', 'packageName': 'openshift-gitops-1/gitops-rhel8-operator', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:openshift_gitops:1'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps', 'packageName': 'openshift-gitops-1/gitops-rhel9', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}] -
CVE Modified by 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Jul. 14, 2026
Action Type Old Value New Value Changed Affected [{'cpes': ['cpe:/a:redhat:openshift_gitops:1.19::el8'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps 1.19', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_gitops:1.20::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps 1.2', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_data_foundation:4'], 'vendor': 'Red Hat', 'product': 'Red Hat Openshift Data Foundation 4', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_gitops:1'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps', 'defaultStatus': 'unaffected'}] [{'cpes': ['cpe:/a:redhat:openshift_gitops:1.19::el8'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps 1.19', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_gitops:1.20::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps 1.20', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_data_foundation:4'], 'vendor': 'Red Hat', 'product': 'Red Hat Openshift Data Foundation 4', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_gitops:1'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps', 'defaultStatus': 'unaffected'}] -
CVE Modified by 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Jun. 30, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:/a:redhat:openshift_gitops:1.19::el8'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps 1.19', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_gitops:1.20::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps 1.2', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_data_foundation:4'], 'vendor': 'Red Hat', 'product': 'Red Hat Openshift Data Foundation 4', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_gitops:1'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift GitOps', 'defaultStatus': 'unaffected'}] Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N Added CWE CWE-201 Added Reference https://access.redhat.com/errata/RHBA-2026:12433 Added Reference https://access.redhat.com/errata/RHSA-2026:20943 Added Reference https://access.redhat.com/errata/RHSA-2026:20947 Added Reference https://access.redhat.com/security/cve/CVE-2026-42880 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2467882 Added Reference https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42880.json -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-42880', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-05-13T00:00:00+00:00'} -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'argoproj', 'product': 'argo-cd', 'versions': [{'status': 'affected', 'version': '>= 3.2.0, < 3.2.11'}, {'status': 'affected', 'version': '>= 3.3.0, < 3.3.9'}]}] -
Initial Analysis by [email protected]
May. 11, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:argoproj:argo_cd:*:*:*:*:*:*:*:* versions from (including) 3.2.0 up to (excluding) 3.2.11 *cpe:2.3:a:argoproj:argo_cd:*:*:*:*:*:*:*:* versions from (including) 3.3.0 up to (excluding) 3.3.9 Added Reference Type CISA-ADP: https://github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3 Types: Exploit, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3 Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 08, 2026
Action Type Old Value New Value Added Reference https://github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3 -
New CVE Received by [email protected]
May. 07, 2026
Action Type Old Value New Value Added Description Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. From versions 3.2.0 to before 3.2.11 and 3.3.0 to before 3.3.9, there is a missing authorization and data-masking gap in Argo CD's ServerSideDiff endpoint that allows an attacker with read-only access to extract plaintext Kubernetes Secret data from etcd via the Kubernetes API server's Server-Side Apply dry-run mechanism. This issue has been patched in versions 3.2.11 and 3.3.9. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N Added CWE CWE-200 Added CWE CWE-212 Added Reference https://github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3