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CVE-2026-42183

Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. From version 4.0.0 to before version 4.0.5, a nil pointer dereference in server/auth/gatekeeper.go rbacAuthorization() causes a panic (denial of service) for SSO users whose claims match a namespace-level RBAC rule but not an SSO-namespace rule, when SSO_DELEGATE_RBAC_TO_NAMESPACE=true. This issue has been patched in version 4.0.5.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:cdac0e061037a75d9e7b176ec8adc55fc6866feaff5ff070c0bedef0e47a0b51
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"argo-workflows","vendor":"argoproj","versions":[{"status":"affected","version":">= 4.0.0, < 4.0.5"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:79de43f81ec4fb01deb3181493443c4ec8a1089413718cf44ad5355c32270bda · sha256:5e05e2134b5730a7… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2.3,"baseSeverity":"LOW","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:79de43f81ec4fb01deb3181493443c4ec8a1089413718cf44ad5355c32270bda · sha256:5e05e2134b5730a7… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-476","description":"CWE-476: NULL Pointer Dereference","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:79de43f81ec4fb01deb3181493443c4ec8a1089413718cf44ad5355c32270bda · sha256:5e05e2134b5730a7… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/argoproj/argo-workflows/commit/c4cc17d0c034fa9a9cc01ef1af6c8016c93071d4","tags":["x_refsource_MISC"],"url":"https://github.com/argoproj/argo-workflows/commit/c4cc17d0c034fa9a9cc01ef1af6c8016c93071d4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:79de43f81ec4fb01deb3181493443c4ec8a1089413718cf44ad5355c32270bda · sha256:5e05e2134b5730a7… · /containers/cna/references/1
{"name":"https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5","tags":["x_refsource_MISC"],"url":"https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:79de43f81ec4fb01deb3181493443c4ec8a1089413718cf44ad5355c32270bda · sha256:5e05e2134b5730a7… · /containers/cna/references/2
{"name":"https://github.com/argoproj/argo-workflows/security/advisories/GHSA-p4gq-3vxj-f4jq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/argoproj/argo-workflows/security/advisories/GHSA-p4gq-3vxj-f4jq"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:79de43f81ec4fb01deb3181493443c4ec8a1089413718cf44ad5355c32270bda · sha256:5e05e2134b5730a7… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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