Negative matcher issue with file protocol

[dmaciejak]

Is there an existing issue for this?

• I have searched the existing issues.

Current Behavior

I have some issue while testing a negative match with file protocol,
not sure if it's a bug or if it's me not understanding the feature.
I am trying to detect if a string is not present in a file.

Expected Behavior

If the string is in the file but negative matcher is set to true, the template should not match.

Steps To Reproduce

I am using the run command: nuclei -t check-username.yaml --target users.txt

$ cat users.txt 
root
john
admin

with those test cases:

Test case 1:

id: check-username

info:
  name: check username
  author: dma
  severity: info

file:
  - extensions:
      - txt
    matchers:
      - type: word
        words:
          - "john"
        negative: false

Output:
[check-username] [file] [info] users.txt
Test:
Is john in the user list ?
Expected result:
Correct, john is in the user list.

Test case 2:

id: check-username

info:
  name: check username
  author: dma
  severity: info

file:
  - extensions:
      - txt
    matchers:
      - type: word
        words:
          - "john"
        negative: true

Output:
[check-username] [file] [info] users.txt
Test:
Is john not in the user list ?
Expected result:
Wrong, the template should not match if john is in the user list.

Please note, if I am checking for another user not in the list, negative matching is working as expected.

Relevant log output

No response

Environment

• OS:
• Nuclei: v3.3.5
• Go:

Anything else?

No response