CVE-2026-42541

MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.3 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 93% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
4.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Kubewarden is a policy engine for Kubernetes. Prior to , An attacker with privileged AdmissionPolicy or AdmissionPolicyGroup create permissions (which isn't the default) can craft a policy that makes use of the can_i host callback. The callback issues a SubjectAccessReview (SAR) requests to enumerate RBAC permissions of any user or service account across the cluster. can_i does not perform that check to enforce the context-aware allow-list and forwards the request directly to the callback handler, which executes a real SubjectAccessReview using policy-server privileges. This creates a policy-level authorization gap: can_i is effectively usable even when the policy has no context-aware resource grant. This is an information disclosure / reconnaissance issue, and not direct workload data exfiltration. The attacker learns permission information, such as whether specific service accounts can "get secrets", "create pods", or "bind clusterroles" in chosen namespaces. This vulnerability is fixed in .

CVSS v3
4.3
EG Score
4.3(medium)
EPSS
6.8%
KEV
Not listed

Published

May 12, 2026

Last Modified

May 13, 2026

Advisory Details (1)

Auto-updated Jun 17, 2026
Patch available. Sources: github.
github Patch Available

RBAC Reconnaissance via unchecked can_i host capability call · Advisory · kubewarden/adm-controller · GitHub

https://github.com/kubewarden/adm-controller/security/advisories/GHSA-wqcw-g35j-j578

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/kubewarden/kubewarden-controller—1.35.0—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 32× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:24 UTCEPSS rescore
  3. 2026-07-20 17:08 UTCEPSS rescore
  4. 2026-07-19 14:31 UTCEPSS rescore
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  6. 2026-07-18 10:04 UTCEPSS rescore
  7. 2026-07-16 17:03 UTCEPSS rescore
  8. 2026-07-16 00:53 UTCOSV refresh
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Show 57 more
  1. 2026-06-28 14:07 UTCEPSS rescore
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  3. 2026-06-27 03:08 UTCEPSS rescore
  4. 2026-06-25 13:49 UTCEPSS rescore
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  6. 2026-06-24 14:05 UTCEPSS rescore
  7. 2026-06-23 21:33 UTCEPSS rescore
  8. 2026-06-22 14:25 UTCEPSS rescore
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  10. 2026-06-21 14:56 UTCEPSS rescore
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  12. 2026-06-21 01:59 UTCEPSS rescore
  13. 2026-06-19 19:25 UTCEPSS rescore
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  17. 2026-06-16 17:52 UTCEPSS rescore
  18. 2026-06-15 17:49 UTCEPSS rescore
  19. 2026-06-13 23:00 UTCEPSS rescore
  20. 2026-06-12 23:12 UTCEPSS rescore
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  22. 2026-06-11 14:00 UTCEPSS rescore
  23. 2026-06-10 22:18 UTCEPSS rescore
  24. 2026-06-10 13:22 UTCEPSS rescore
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  26. 2026-06-08 14:17 UTCEPSS rescore
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  30. 2026-06-06 13:47 UTCEPSS rescore
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  32. 2026-06-05 22:47 UTCEPSS rescore
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  37. 2026-06-02 20:13 UTCEPSS rescore
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  40. 2026-05-31 22:30 UTCEPSS rescore
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  42. 2026-05-31 00:16 UTCEPSS rescore
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  44. 2026-05-29 13:44 UTCEPSS rescore
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  46. 2026-05-28 13:44 UTCEPSS rescore
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  48. 2026-05-27 13:40 UTCEPSS rescore
  49. 2026-05-27 13:40 UTCEPSS rescore
  50. 2026-05-26 13:44 UTCEPSS rescore
  51. 2026-05-26 07:18 UTCEPSS rescore
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  53. 2026-05-20 22:38 UTCEPSS rescore
  54. 2026-05-20 22:38 UTCEPSS rescore
  55. 2026-05-20 12:47 UTCEG score recompute
  56. 2026-05-20 11:22 UTCEPSS rescore
  57. 2026-05-20 11:22 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-42541?
CVE-2026-42541 is a medium vulnerability published on May 12, 2026. Kubewarden is a policy engine for Kubernetes. Prior to , An attacker with privileged AdmissionPolicy or AdmissionPolicyGroup create permissions (which isn't the default) can craft a policy that makes use of the cani host callback. The callback issues a SubjectAccessReview (SAR) requests to…
When was CVE-2026-42541 disclosed?
CVE-2026-42541 was first published in the National Vulnerability Database on May 12, 2026, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42541 actively exploited?
CVE-2026-42541 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42541?
CVE-2026-42541 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-42541?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42541, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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