CVE-2026-66786
CVE-2026-66786: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityCritical9.1
Critical [CVE-2026-66786] ipsec.conf stanza injection via remote-supplied CableName and Subnets
CVE-2026-66786Source published Source updated
A flaw was found in submariner. In cert-auth mode, the connection configuration is built using free-form strings from the Custom Resource Definition (CRD) without proper validation. A malicious cluster can exploit this by publishing a CableName that includes newlines and ipsec.conf directives. This allows an attacker to inject arbitrary configuration parameters or execute commands through leftupdown hooks, leading to remote code execution as root on the gateway node. Red Hat rates this flaw as Moderate severity rather than Important because exploitation requires two non-default configurations that must both be explicitly enabled by an administrator. The vulnerable code path exists only in Submariner's certificate-based IPsec authentication mode, which is disabled by default…
- Affected products in this advisory
- Red Hat Advanced Cluster Management for Kubernetes 2.17
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- rhacm2/lighthouse-agent-rhel9:1788023916
- rhacm2/lighthouse-coredns-rhel9:1788023940
- rhacm2/subctl-rhel9:1788105072
- rhacm2/submariner-gateway-rhel9:1788043964
4 more entries in the full advisory.
- Mitigation guidance
- If Submariner certificate-based IPsec authentication mode is enabled (`IPSecCertAuthMode: true` in the SubmarinerConfig), administrators can mitigate this flaw by switching to the default pre-shared key (PSK) authentication mode. Set `IPSecCertAuthMode: false` (or remove the field to use its default value) in the SubmarinerConfig CR and redeploy the Submariner gateway pods. PSK mode provides equivalent inter-cluster IPsec tunnel encryption and is not affected by this vulnerability. Note that disabling cert-auth mode means Submariner will no longer integrate with OVN IPsec's certificate infrastructure and will manage its own PSK-based authentication independently.
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