CVE-2026-32737
published 2026-03-18CVE-2026-32737: Romeo gives the capability to reach high code coverage of Go ≥1.20 apps by helping to measure code coverage for functional and integration tests within GitHub…
PriorityP265critical10CVSS 3.1
AVNACLPRNUINSCCHIHAH
EPSS
0.39%
30.4th percentile
Romeo gives the capability to reach high code coverage of Go ≥1.20 apps by helping to measure code coverage for functional and integration tests within GitHub Actions. Prior to version 0.2.1, due to a mis-written NetworkPolicy, a malicious actor can pivot from the "hardened" namespace to any Pod out of it. This breaks the security-by-default property expected as part of the deployment program, leading to a potential lateral movement. Removing the `inter-ns` NetworkPolicy patches the vulnerability in version 0.2.1. If updates are not possible in production environments, manually delete `inter-ns` and update as soon as possible. Given one's context, delete the failing network policy that should be prefixed by `inter-ns-` in the target namespace.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| ctfer-io | romeo | < 0.2.1 | 0.2.1 |
| github.com | ctfer-io_romeo_environment_deploy | >= 0 < 0.2.1 | 0.2.1 |
Detection & IOCsextracted from sources · hover to see the quote
- →Detect presence of the misconfigured 'inter-ns' NetworkPolicy in Kubernetes namespaces, which is the root cause of the lateral movement vulnerability. ↗
- →Hunt for NetworkPolicy objects with names prefixed by 'inter-ns-' in target namespaces as indicators of vulnerable deployments. ↗
- →Monitor for unexpected cross-namespace pod-to-pod traffic originating from the 'hardened' namespace, which may indicate active exploitation of this lateral movement vulnerability. ↗
- ·The vulnerability affects only deployments using github.com/ctfer-io/romeo/environment/deploy prior to version 0.2.1; the misconfigured NetworkPolicy is named 'inter-ns' (or prefixed 'inter-ns-'). ↗
- ·If upgrading to v0.2.1 is not immediately possible, the interim mitigation is to manually delete the 'inter-ns' NetworkPolicy. ↗
- ·The vulnerability is scoped to Go ≥1.20 applications instrumented with Romeo for coverage measurement in GitHub Actions environments. ↗
CVSS provenance
nvdv3.110.0CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
nvdv4.07.9HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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OSV
Romeo's invalid NetworkPolicy enables a malicious actor to pivot into another namespace in github.com/ctfer-io/romeo/environment/deploy
osv·2026-03-26
CVE-2026-32737 Romeo's invalid NetworkPolicy enables a malicious actor to pivot into another namespace in github.com/ctfer-io/romeo/environment/deploy
Romeo's invalid NetworkPolicy enables a malicious actor to pivot into another namespace in github.com/ctfer-io/romeo/environment/deploy
Romeo's invalid NetworkPolicy enables a malicious actor to pivot into another namespace in github.com/ctfer-io/romeo/environment/deploy.
NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions.
(If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.)
The additional affected modules and versions are: github.com/ctfer-io/romeo/environment/deploy before v0.2.1.
OSV
Romeo's invalid NetworkPolicy enables a malicious actor to pivot into another namespace
osv·2026-03-16
CVE-2026-32737 [HIGH] Romeo's invalid NetworkPolicy enables a malicious actor to pivot into another namespace
Romeo's invalid NetworkPolicy enables a malicious actor to pivot into another namespace
### Impact
Due to a mis-written NetworkPolicy, a malicious actor can pivot from the "hardened" namespace to any Pod out of it.
This breaks the security-by-default property expected as part of the deployment program, leading to a potential lateral movement.
### Patch
Removing the `inter-ns` NetworkPolicy patches the vulnerability. If updates are not possible in production environments, we recommend to manually delete it and update as soon as possible.
### Workaround
Given your context, delete the failing network policy that should be prefixed by `inter-ns-` in the target namespace.
GHSA
Romeo's invalid NetworkPolicy enables a malicious actor to pivot into another namespace
ghsa·2026-03-16
CVE-2026-32737 [HIGH] CWE-284 Romeo's invalid NetworkPolicy enables a malicious actor to pivot into another namespace
Romeo's invalid NetworkPolicy enables a malicious actor to pivot into another namespace
### Impact
Due to a mis-written NetworkPolicy, a malicious actor can pivot from the "hardened" namespace to any Pod out of it.
This breaks the security-by-default property expected as part of the deployment program, leading to a potential lateral movement.
### Patch
Removing the `inter-ns` NetworkPolicy patches the vulnerability. If updates are not possible in production environments, we recommend to manually delete it and update as soon as possible.
### Workaround
Given your context, delete the failing network policy that should be prefixed by `inter-ns-` in the target namespace.
No detection rules found.
No public exploits indexed.
2026-03-18
Published