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CVE-2026-42880

42
FAUCET Score

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.

First published: May 7, 2026Last modified: May 8, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.2.0, < 3.2.11CPE matchmatch criteria
cpe:2.3:a:argoproj:argo_cd:*:*:*:*:*:*:*:*
>= 3.3.0, < 3.3.9CPE matchmatch criteria
cpe:2.3:a:argoproj:argo_cd:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.6CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.1
Impact Score
5.8
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.51%
Probability of exploitation in next 30 days
EPSS Percentile
40.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0051 is in the 41st percentile among its peer group of 1,124 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 1.0 Bluesky, 0.5 Mastodon, and 1.6 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

gopatch availablevia ghsa
Product: github.com/argoproj/argo-cd/v3Fixed in: 3.2.11
gopatch availablevia ghsa
Product: github.com/argoproj/argo-cd/v3Fixed in: 3.3.9
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

goGHSA-3v3m-wc6v-x4x3critical

ArgoCD ServerSideDiff is vulnerable to Kubernetes Secret Extraction

May 7, 2026

References

access.redhat.com / errata/RHBA-2026:12433
access.redhat.com / errata/RHSA-2026:20943
access.redhat.com / errata/RHSA-2026:20947
access.redhat.com / security/cve/CVE-2026-42880
bugzilla.redhat.com / show_bug.cgi
security.access.redhat.com / data/csaf/v2/vex/2026/cve-2026-42880.json
github.com / argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3
ExploitVendor Advisory