projectdiscovery/nuclei · error

couldn't iterate on nested item "%s": %s

Error message

couldn't iterate on nested item "%s": %s

What it means

Error "couldn't iterate on nested item "%s": %s" thrown in projectdiscovery/nuclei.

Source

Thrown at pkg/reporting/trackers/jira/jira.go:290

	severityLabel := fmt.Sprintf("Severity:%s", event.Info.SeverityHolder.Severity.String())
	if i.options.SeverityAsLabel && severityLabel != "" {
		labels = append(labels, severityLabel)
	}
	if label := i.options.IssueType; label != "" {
		labels = append(labels, label)
	}
	// Build template context for evaluating custom field templates
	templateCtx := buildTemplateContext(event)

	// Process custom fields with template evaluation support
	customFields := tcontainer.NewMarshalMap()
	for name, value := range i.options.CustomFields {
		if valueMap, ok := value.(map[interface{}]interface{}); ok {
			// Iterate over nested map
			for nestedName, nestedValue := range valueMap {
				fmtNestedValue, ok := nestedValue.(string)
				if !ok {
					return nil, fmt.Errorf(`couldn't iterate on nested item "%s": %s`, nestedName, nestedValue)
				}

				// Evaluate template or handle legacy $variable syntax
				evaluatedValue, err := i.evaluateCustomFieldValue(fmtNestedValue, templateCtx, event)
				if err != nil {
					gologger.Warning().Msgf("Failed to evaluate template for field %s.%s: %v", name, nestedName, err)
					evaluatedValue = fmtNestedValue // fallback to original value
				}

				switch nestedName {
				case "id":
					customFields[name] = map[string]interface{}{"id": evaluatedValue}
				case "name":
					customFields[name] = map[string]interface{}{"value": evaluatedValue}
				case "freeform":
					customFields[name] = evaluatedValue
				}
			}

View on GitHub (pinned to 265b3a3dec)

When it happens

Trigger: Thrown at pkg/reporting/trackers/jira/jira.go:290 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of projectdiscovery/nuclei@265b3a3dec (2026-08-15). Data as JSON: /api/errors/f13451fceba3dc29. Report an issue: GitHub.