Tag Listing Not Working

[LocaMartin]

-tgl is not working without -debug how to fix it

Nuclei: v3.7.0
Template Version: v10.3.9
Go version: go1.24.13 linux/amd64

[bad-antics]

The -tgl (tag list) flag showing blank output without -debug is a display issue that occurs when stdout is being buffered or when the output format conflicts with the stats display.

Workaround solutions:

1. Pipe the output to force line buffering:

nuclei -tgl | cat

2. Redirect to file then view:

nuclei -tgl > tags.txt && cat tags.txt

3. Use -jsonl output for structured tag listing:

nuclei -tgl -jsonl

4. Alternative: list tags with grep directly from templates:

# Linux/macOS
grep -rh "tags:" ~/nuclei-templates/ | tr ',' '\n' | sort -u

# Or use nuclei's template list with tag filter
nuclei -tl -tags cve | head -20

The reason -debug makes it work is that debug mode forces unbuffered output and changes the logging behavior, which bypasses the display issue.

This appears to be a regression in v3.7.0's output handling. If the workarounds above don't help, consider filing a bug report with the exact terminal/shell you're using (cmd, powershell, bash, etc.) — that info helps the team reproduce it.

[bad-antics]

The -tgl (tag list) flag showing blank output without -debug is a display issue that occurs when stdout is being buffered or when the output format conflicts with the stats display.

Workaround solutions:

1. Pipe the output to force line buffering:

nuclei -tgl | cat

2. Redirect to file then view:

nuclei -tgl > tags.txt && cat tags.txt

3. Use -jsonl output for structured tag listing:

nuclei -tgl -jsonl

4. Alternative: list tags with grep directly from templates:

# Linux/macOS
grep -rh "tags:" ~/nuclei-templates/ | tr ',' '\n' | sort -u

# Or use nuclei's template list with tag filter
nuclei -tl -tags cve | head -20

The reason -debug makes it work is that debug mode forces unbuffered output and changes the logging behavior, which bypasses the display issue.

This appears to be a regression in v3.7.0's output handling. If the workarounds above don't help, consider filing a bug report with the exact terminal/shell you're using (cmd, powershell, bash, etc.) — that info helps the team reproduce it.

[bad-antics]

The -tgl (tag list) flag has a known output buffering issue in v3.7.0 where the output gets swallowed unless -debug forces unbuffered writes.

Workarounds:

1. Pipe to a file — forces flush:

nuclei -tgl 2>&1 | tee tags.txt

2. Use -jsonl output to force structured output:

nuclei -tgl -jsonl

3. Use grep to extract tags from templates directly (more reliable):

grep -rh "tags:" ~/nuclei-templates/ | tr ',' '\n' | sed 's/.*tags: *//' | sort -u

4. Downgrade to test — if it worked in a prior version, pin to that:

go install -v github.com/projectdiscovery/nuclei/v3/cmd/nuclei@v3.3.7

This looks like a regression — the tag listing output is being captured by the stats/progress display. Adding -silent or -debug both bypass that capture layer. You could also open a bug report referencing this discussion since it's a clear behavioral change from previous versions.