How severe is CVE-2026-42295?

No CVSS score has been assigned to CVE-2026-42295 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2026-42295?

CVE-2026-42295 affects the following packages: github.com/argoproj/argo-workflows/v4 (Go). Ecosystems affected: Go.

How do I fix CVE-2026-42295?

Update github.com/argoproj/argo-workflows/v4 to 4.0.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-42295 is resolved across your whole dependency graph.

How do I detect CVE-2026-42295 in my Go dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/argoproj/argo-workflows/v4, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2026-42295 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against CVE-2026-42295?

O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2026-42295 can be triaged on real exposure rather than presence alone.

Is CVE-2026-42295 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-42295 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-42295?

CVE-2026-42295 has an EPSS (Exploit Prediction Scoring System) score of 0.4%, placing it in the 29th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-42295?

CVE-2026-42295 is classified as CWE-522 (CWE-522). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2026-42295 published, and has it been updated?

CVE-2026-42295 was published on May 9, 2026 and was last updated on August 12, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐹 Go

Not in CISA KEV

CVE-2026-42295 — v4

Fix: argoproj/argo-workflows@bdd4090

CVE-2026-42295 is a CWE-522 vulnerability in github.com/argoproj/argo-workflows/v4. A fix is available for github.com/argoproj/argo-workflows/v4 — see the affected versions and patch details below.

Argo Workflows: Exposure of artifact repository credentials

Also known asBIT-argo-workflows-2026-42295GHSA-7vf8-2cr6-54mfGO-2026-5235

Published

May 9, 2026

Updated

Aug 12, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Sep 21, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

0.4%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs29th percentile — riskier than 29% of all scored CVEsHighest risk

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Real-World Exposure

1 pkg affected

🐹github.com/argoproj/argo-workflows/v4

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Summary

The workflow executor logs all artifact repository credentials (S3 access keys, secret keys, GCS service account keys, Azure account keys, Git passwords, etc.) in plaintext on artifact operation. Any user with read access to workflow pod logs can extract these credentials.

Note: This is an incomplete fix of CVE-2025-62157

Details

The logging driver passes the entire ArtifactDriver struct to the structured logger, for example: https://github.com/argoproj/argo-workflows/blob/59f1089b9875723ddffd524513e6bd5cb37e5e31/workflow/artifacts/logging/driver.go#L24

Exposed credential fields:

S3 (workflow/artifacts/s3/s3.go): AccessKey, SecretKey, SessionToken, ServerSideCustomerKey
OSS (workflow/artifacts/oss/oss.go): AccessKey, SecretKey, SecurityToken
GCS (workflow/artifacts/gcs/gcs.go): ServiceAccountKey

PoC

Create template

apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
  name: cred-leak-test
  namespace: argo
spec:
  entrypoint: main
  templates:
  - name: main
    container:
      image: alpine:3.13
      command: [sh, -c]
      args: ["echo 'hello' > /tmp/output.txt"]
    outputs:
      artifacts:
      - name: output
        path: /tmp/output.txt
        s3:
          endpoint: minio:9000
          insecure: true
          bucket: my-bucket
          key: test-output.txt
          accessKeySecret:
            name: my-minio-cred
            key: accesskey
          secretKeySecret:
            name: my-minio-cred
            key: secretkey

Then check the logs kubectl -n argo logs "cred-leak-test" -c wait <img width="1248" height="322" alt="image" src="https://github.com/user-attachments/assets/a5cf6d66-7d67-408d-8583-27d11ecf1507" />

Impact

Any user with Kubernetes RBAC permissions to read pod logs in the workflow namespace can extract artifact repository credentials.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐹Go	`github.com/argoproj/argo-workflows/v4`	≥ 4.0.0&&< 4.0.5	4.0.5`go get github.com/argoproj/argo-workflows/v4@v4.0.5`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/argoproj/argo-workflows/v4, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/argoproj/argo-workflows/v4 to 4.0.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-42295 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2026-42295 can be triaged on real exposure rather than presence alone.

Tailored to CVE-2026-42295. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

### Summary The workflow executor logs all artifact repository credentials (S3 access keys, secret keys, GCS service account keys, Azure account keys, Git passwords, etc.) in plaintext on artifact operation. Any user with read access to workflow pod logs can extract these credentials. **Note:** This is an incomplete fix of [CVE-2025-62157](https://github.com/argoproj/argo-workflows/security/advisories/GHSA-c2hv-4pfj-mm2r) ### Details The logging driver passes the entire ArtifactDriver struct to the structured logger, for example: https://github.com/argoproj/argo-workflows/blob/59f1089b9875723

O3 Security · Impact-Aware SCA

Is CVE-2026-42295 in your dependencies?

O3 Security finds CVE-2026-42295 across Go dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

Scan my dependencies How O3 SCA works