GHSA-4xh5-jcj2-ch8q: github.com/controlplaneio-fluxcd/flux-operator fixed in 0.40.0

GHSA-4xh5-jcj2-ch8q PUBLISHED CVSS 5.300000190734863 MEDIUM

Flux Operator Web UI Impersonation Bypass via Empty OIDC Claims

Record from GitHub Advisory Database · Published January 21, 2026

github.com/controlplaneio-fluxcd/flux-operator is fixed in 0.40.0 (Go Modules)

Flux Operator Web UI Impersonation Bypass via Empty OIDC Claims

Fixed versions

Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.

Package	Ecosystem	Fixed in
github.com/controlplaneio-fluxcd/flux-operator	Go Modules	0.40.0
flux-operator-fips	Chainguard	0.40.0-r0
flux-operator	Chainguard	0.40.0-r0
flux-operator	Wolfi	0.40.0-r0

Risk scores

CVSS 3.1

5.300000190734863

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

Affected products

Vendor	Product	Versions
github.com	controlplaneio-fluxcd/flux-operator	0.36.0
chainguard	flux-operator-fips	0
chainguard	flux-operator	0
wolfi	flux-operator	0

Timeline

Jan 21, 2026 CVE Published
Apr 30, 2026 Security Advisory

Query this with the API

The same record, from the CLI:

vulnetix vdb vuln GHSA-4xh5-jcj2-ch8q
vulnetix vdb fixes GHSA-4xh5-jcj2-ch8q

Or with curl, using the org id and key from your account page:

curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/GHSA-4xh5-jcj2-ch8q/fixes/registry"

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References

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