[BUG] Can't use expressions/variables in DNS resolver config

[kor-condignum]

Is there an existing issue for this?

• I have searched the existing issues.

Current Behavior

I am trying to use an expression/variable in the resolvers config in a custom template:

variables:
  test_resolver: "1.1.1.1"

dns:
  - name: "{{FQDN}}"
    type: A
    resolvers:
      - "{{test_resolver}}"

When trying to run this template it fails:

[WRN] Could not parse template /home/user/nuclei-templates/dns/dns-test.yaml: could not compile request: could not get dns client: could not resolve resolvers expressions: failed to evaluate expression "test_resolver": No parameter 'test_resolver' found.

Expected Behavior

I am expecting expressions/variables to be correctly evaluated. My end goal is to use a previously extracted variable as the resolver for a subsequent DNS query.

Steps To Reproduce

Run nuclei with the following template (./nuclei -target google.com -t nuclei-templates/dns/dns-test.yaml -v):

id: dns-test

info:
  name: Test
  author: Test
  description: Test
  severity: info

variables:
  test_resolver: "1.1.1.1"

dns:
  - name: "{{FQDN}}"
    type: A
    resolvers:
      - "{{test_resolver}}"

    matchers:
      - type: regex
        part: answer
        regex:
          - "IN\tA\t(.+)$"

Relevant log output

Environment

- OS: Ubuntu 22.04.5 LTS
- Nuclei: v3.8.0

Anything else?

No response