diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 85db816..bfc2d1b 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -30,6 +30,10 @@ jobs:
           scripts/third-party-notices.sh "$RUNNER_TEMP/notices.txt"
           diff -u THIRD_PARTY_NOTICES.txt "$RUNNER_TEMP/notices.txt"
           cp LICENSE THIRD_PARTY_NOTICES.txt dist/
+          # The detector catalog DefectDojo reads to tell which detectors this release
+          # contains, also covered by the signed checksums.
+          "dist/earlylight_${GITHUB_REF_NAME}_linux_amd64" detectors --format json > dist/detectors.json
+          grep -q "\"version\": \"${GITHUB_REF_NAME}\"" dist/detectors.json
           (cd dist && sha256sum -- * > checksums.txt)
       - uses: sigstore/cosign-installer@v3
       - name: Sign checksums
diff --git a/README.md b/README.md
index b66e5a0..a2fd231 100644
--- a/README.md
+++ b/README.md
@@ -38,6 +38,7 @@ Release binaries for Linux, macOS and Windows are on the [releases page](https:/
 
 ```bash
 earlylight detectors                                   # list detectors
+earlylight detectors --format json                     # the detector catalog, as each release's detectors.json
 earlylight scan image php:8.3-fpm                      # every detector that scans images
 earlylight scan image --detector php2shell php:8.3-fpm
 earlylight scan image --detector brotli node:24.22.0-slim
@@ -56,6 +57,8 @@ earlylight fix --dry-run .                             # show the image updates
 
 Exit status: `0` nothing vulnerable or unknown, `1` something vulnerable, `2` error (including "nothing was scanned"), `3` nothing vulnerable but something unknown, or with `--fail-on-skip`, something not scanned. Output is `--format text`, `json` or `sarif`. SARIF rule IDs are `<detector>/<kind>`.
 
+Each release also attaches `detectors.json`, listed in the signed `checksums.txt`. It is the output of `earlylight detectors --format json` for that release: for every detector its ID, title, CVEs, advisories, disclosure date, the commands that run it (`fs`, `image`, `host`, `repo`, `fix`) and its finding kinds. Tools such as DefectDojo read it to tell which detectors a release contains without running a binary. `schema` changes only when a field is removed or changes meaning.
+
 ## GitHub Action
 
 ```yaml
diff --git a/detectors/all/all_test.go b/detectors/all/all_test.go
new file mode 100644
index 0000000..c8a42cc
--- /dev/null
+++ b/detectors/all/all_test.go
@@ -0,0 +1,73 @@
+package all_test
+
+import (
+	"bytes"
+	"encoding/json"
+	"net/url"
+	"regexp"
+	"testing"
+	"time"
+
+	_ "github.com/DefectDojo/earlylight/detectors/all"
+	"github.com/DefectDojo/earlylight/internal/cli"
+)
+
+// The catalog is a contract: tools such as DefectDojo read detectors.json from
+// each release to tell which detectors it contains and how to run each one.
+// Every real detector must fill it in completely.
+func TestCatalogContract(t *testing.T) {
+	var out, errb bytes.Buffer
+	if got := cli.Run(cli.Config{Tool: "earlylight", Version: "v0.0.0", Summary: "t"}, []string{"detectors", "--format", "json"}, &out, &errb); got != 0 {
+		t.Fatalf("exit %d: %s", got, errb.String())
+	}
+	var cat cli.Catalog
+	if err := json.Unmarshal(out.Bytes(), &cat); err != nil {
+		t.Fatal(err)
+	}
+	if len(cat.Detectors) < 3 {
+		t.Fatalf("only %d detectors", len(cat.Detectors))
+	}
+	id := regexp.MustCompile(`^[a-z0-9][a-z0-9-]*$`)
+	cve := regexp.MustCompile(`^CVE-\d{4}-\d{4,}$`)
+	modes := map[string]bool{"fs": true, "image": true, "host": true, "repo": true, "fix": true}
+	levels := map[string]bool{"error": true, "warning": true, "note": true}
+	for _, d := range cat.Detectors {
+		if !id.MatchString(d.ID) || d.Title == "" {
+			t.Errorf("%q: id or title", d.ID)
+		}
+		if _, err := time.Parse("2006-01-02", d.Disclosed); err != nil {
+			t.Errorf("%s: disclosed %q is not YYYY-MM-DD", d.ID, d.Disclosed)
+		}
+		for _, c := range d.CVEs {
+			if !cve.MatchString(c) {
+				t.Errorf("%s: CVE %q", d.ID, c)
+			}
+		}
+		if len(d.Advisories) == 0 {
+			t.Errorf("%s: no advisory link (the first one is the SARIF help link)", d.ID)
+		}
+		for _, a := range d.Advisories {
+			if u, err := url.Parse(a); err != nil || u.Scheme != "https" || u.Host == "" {
+				t.Errorf("%s: advisory %q is not an https link", d.ID, a)
+			}
+		}
+		if len(d.Modes) == 0 {
+			t.Errorf("%s: no modes", d.ID)
+		}
+		for _, m := range d.Modes {
+			if !modes[m] {
+				t.Errorf("%s: mode %q", d.ID, m)
+			}
+		}
+		if len(d.Kinds) == 0 {
+			t.Errorf("%s: no kinds", d.ID)
+		}
+		seen := map[string]bool{}
+		for _, k := range d.Kinds {
+			if !id.MatchString(k.ID) || seen[k.ID] || k.Title == "" || !levels[k.Level] {
+				t.Errorf("%s/%s: kind id, title or level (%q)", d.ID, k.ID, k.Level)
+			}
+			seen[k.ID] = true
+		}
+	}
+}
diff --git a/detectors/emudhra/emudhra.go b/detectors/emudhra/emudhra.go
index db7ba0a..13a6d46 100644
--- a/detectors/emudhra/emudhra.go
+++ b/detectors/emudhra/emudhra.go
@@ -22,6 +22,10 @@ import (
 // ID is the detector's ID.
 const ID = "emudhra"
 
+// goCVE is Go's fix for the compromised intermediates. Only unpatched-go
+// findings carry it: the trust findings are about the CA keys, which have no CVE.
+const goCVE = "CVE-2026-111943"
+
 // Detector implements engine.Detector and engine.Prober.
 type Detector struct {
 	det *detect.Detector
@@ -34,7 +38,7 @@ func (d *Detector) Manifest() engine.Manifest {
 	return engine.Manifest{
 		ID:         ID,
 		Title:      "Trust in the compromised eMudhra intermediate CA keys",
-		CVEs:       []string{"CVE-2026-111943"},
+		CVEs:       []string{goCVE},
 		Advisories: []string{"https://bugzilla.mozilla.org/show_bug.cgi?id=2083449"},
 		Disclosed:  "2026-10-20",
 		Targets:    []engine.TargetKind{engine.Filesystem, engine.Image, engine.Host},
@@ -153,6 +157,10 @@ func finding(r assess.Result) engine.Finding {
 	if !ok {
 		v = engine.Unknown
 	}
+	var cves []engine.CVEResult
+	if r.Kind == detect.UnpatchedGo {
+		cves = []engine.CVEResult{{ID: goCVE, Verdict: v, Reason: r.Reason}}
+	}
 	return engine.Finding{
 		Kind:    string(r.Kind),
 		Path:    r.Path,
@@ -161,6 +169,7 @@ func finding(r assess.Result) engine.Finding {
 		Message: r.Detail,
 		Method:  r.Method,
 		Facts:   facts,
+		CVEs:    cves,
 		Details: r.Finding,
 	}
 }
diff --git a/detectors/emudhra/finding_test.go b/detectors/emudhra/finding_test.go
new file mode 100644
index 0000000..dbf6cc8
--- /dev/null
+++ b/detectors/emudhra/finding_test.go
@@ -0,0 +1,27 @@
+package emudhra
+
+import (
+	"testing"
+
+	"github.com/DefectDojo/earlylight/detectors/emudhra/internal/assess"
+	"github.com/DefectDojo/earlylight/detectors/emudhra/internal/detect"
+	"github.com/DefectDojo/earlylight/internal/engine"
+)
+
+// Only a Go binary without the blocklist is CVE-2026-111943. DefectDojo files
+// findings under their CVEs, so a trust finding that carried it would be
+// grouped with a Go bug it has nothing to do with.
+func TestOnlyUnpatchedGoCarriesTheCVE(t *testing.T) {
+	gof := finding(assess.Result{Finding: detect.Finding{Kind: detect.UnpatchedGo, Path: "/usr/bin/app"}, Status: assess.Active})
+	if len(gof.CVEs) != 1 || gof.CVEs[0].ID != goCVE || gof.CVEs[0].Verdict != engine.Vulnerable {
+		t.Errorf("unpatched-go CVEs = %+v, want %s vulnerable", gof.CVEs, goCVE)
+	}
+	inactive := finding(assess.Result{Finding: detect.Finding{Kind: detect.UnpatchedGo, Path: "/usr/bin/app"}, Status: assess.Inactive, Reason: "never verifies chains"})
+	if len(inactive.CVEs) != 1 || inactive.CVEs[0].Verdict != engine.Inactive || inactive.CVEs[0].Reason == "" {
+		t.Errorf("an inactive Go binary's CVE must say inactive and why: %+v", inactive.CVEs)
+	}
+	trust := finding(assess.Result{Finding: detect.Finding{Kind: detect.TrustsCompromisedKey, Path: "/etc/ssl/cert.pem"}, Status: assess.Active})
+	if len(trust.CVEs) != 0 {
+		t.Errorf("trust finding carries CVEs %+v", trust.CVEs)
+	}
+}
diff --git a/internal/cli/catalog.go b/internal/cli/catalog.go
new file mode 100644
index 0000000..f0ce1e1
--- /dev/null
+++ b/internal/cli/catalog.go
@@ -0,0 +1,82 @@
+package cli
+
+import (
+	"github.com/DefectDojo/earlylight/internal/engine"
+)
+
+// CatalogSchema changes only when a field is removed or changes meaning. New
+// fields are added without changing it.
+const CatalogSchema = 1
+
+// Catalog is what "earlylight detectors --format json" prints. Each release
+// attaches it as detectors.json, so DefectDojo can tell which detectors a
+// release contains without downloading and running a binary.
+type Catalog struct {
+	Schema    int            `json:"schema"`
+	Tool      string         `json:"tool"`
+	Version   string         `json:"version"`
+	Detectors []CatalogEntry `json:"detectors"`
+}
+
+// CatalogEntry is one detector, taken from its manifest.
+type CatalogEntry struct {
+	ID         string   `json:"id"`
+	Title      string   `json:"title"`
+	CVEs       []string `json:"cves"`
+	Advisories []string `json:"advisories"`
+	Disclosed  string   `json:"disclosed"`
+	// Modes are the commands that run the detector: fs, image, host, repo, fix.
+	Modes []string      `json:"modes"`
+	Kinds []CatalogKind `json:"kinds"`
+	Tags  []string      `json:"tags"`
+	Data  string        `json:"data,omitempty"`
+}
+
+// CatalogKind is one type of finding. Its SARIF rule ID is "<detector>/<id>".
+type CatalogKind struct {
+	ID          string   `json:"id"`
+	Title       string   `json:"title"`
+	Level       string   `json:"level"`
+	Description string   `json:"description,omitempty"`
+	Severity    string   `json:"severity,omitempty"`
+	CWEs        []string `json:"cwes,omitempty"`
+}
+
+// modeOf is the command for each target kind, in the order the usage text
+// lists them.
+var modeOf = []struct {
+	kind engine.TargetKind
+	mode string
+}{{engine.Filesystem, "fs"}, {engine.Image, "image"}, {engine.Host, "host"}, {engine.Repository, "repo"}}
+
+// catalog describes every registered detector. Lists are never null, so a
+// reader can range over them without checking.
+func (c Config) catalog() Catalog {
+	out := Catalog{Schema: CatalogSchema, Tool: c.Tool, Version: c.version(), Detectors: []CatalogEntry{}}
+	for _, d := range engine.Detectors() {
+		m := d.Manifest()
+		e := CatalogEntry{ID: m.ID, Title: m.Title, CVEs: nonNil(m.CVEs), Advisories: nonNil(m.Advisories),
+			Disclosed: m.Disclosed, Modes: []string{}, Kinds: []CatalogKind{}, Tags: nonNil(m.Tags), Data: m.Data}
+		for _, k := range modeOf {
+			if m.Supports(k.kind) {
+				e.Modes = append(e.Modes, k.mode)
+			}
+		}
+		if _, ok := d.(engine.Fixer); ok && m.Supports(engine.Repository) {
+			e.Modes = append(e.Modes, "fix")
+		}
+		for _, k := range m.Kinds {
+			e.Kinds = append(e.Kinds, CatalogKind{ID: k.ID, Title: k.Title, Level: k.Level, Description: k.Description,
+				Severity: k.SecuritySeverity, CWEs: k.CWEs})
+		}
+		out.Detectors = append(out.Detectors, e)
+	}
+	return out
+}
+
+func nonNil(s []string) []string {
+	if s == nil {
+		return []string{}
+	}
+	return s
+}
diff --git a/internal/cli/cli.go b/internal/cli/cli.go
index dc717bc..6d3dcab 100644
--- a/internal/cli/cli.go
+++ b/internal/cli/cli.go
@@ -5,6 +5,7 @@ package cli
 
 import (
 	"context"
+	"encoding/json"
 	"flag"
 	"fmt"
 	"io"
@@ -85,7 +86,8 @@ func (c Config) usage() string {
 		fmt.Fprintf(&b, "  %s fix [flags] DIR...          move those image references to published fixed images\n", c.Tool)
 	}
 	if c.Detector == "" {
-		fmt.Fprintf(&b, "  %s detectors                  list the detectors\n", c.Tool)
+		fmt.Fprintf(&b, "  %s detectors [--format json]    list the detectors (json: the catalog each release\n", c.Tool)
+		fmt.Fprintf(&b, "  %s                              attaches as detectors.json)\n", strings.Repeat(" ", len(c.Tool)))
 	}
 	fmt.Fprintf(&b, "  %s version\n", c.Tool)
 	b.WriteString("\nFlags:\n")
@@ -144,6 +146,39 @@ func (l *list) Set(s string) error {
 	return nil
 }
 
+// detectors lists the detectors: one line each, or the catalog as JSON.
+func (c Config) detectors(args []string, stdout, stderr io.Writer) int {
+	fs := flag.NewFlagSet("detectors", flag.ContinueOnError)
+	fs.SetOutput(stderr)
+	fs.Usage = func() { fmt.Fprint(stderr, c.usage()) }
+	format := fs.String("format", "text", "")
+	if err := fs.Parse(args); err != nil {
+		return 2
+	}
+	if fs.NArg() > 0 {
+		fs.Usage()
+		return 2
+	}
+	switch *format {
+	case "text":
+		for _, d := range engine.Detectors() {
+			m := d.Manifest()
+			fmt.Fprintf(stdout, "%-12s %s\n", m.ID, m.Title)
+		}
+	case "json":
+		enc := json.NewEncoder(stdout)
+		enc.SetIndent("", "  ")
+		if err := enc.Encode(c.catalog()); err != nil {
+			fmt.Fprintf(stderr, "%s: %v\n", c.Tool, err)
+			return 2
+		}
+	default:
+		fmt.Fprintf(stderr, "%s: unknown --format %q (detectors: text or json)\n", c.Tool, *format)
+		return 2
+	}
+	return 0
+}
+
 var kinds = map[string]engine.TargetKind{"fs": engine.Filesystem, "image": engine.Image, "host": engine.Host, "repo": engine.Repository, "fix": engine.Repository}
 
 // Run runs the command line and returns the exit status.
@@ -162,11 +197,7 @@ func Run(c Config, args []string, stdout, stderr io.Writer) int {
 		return 0
 	case "detectors":
 		if c.Detector == "" {
-			for _, d := range engine.Detectors() {
-				m := d.Manifest()
-				fmt.Fprintf(stdout, "%-12s %s\n", m.ID, m.Title)
-			}
-			return 0
+			return c.detectors(args[1:], stdout, stderr)
 		}
 	}
 	if c.Detector == "" && args[0] != "fix" {
diff --git a/internal/cli/cli_test.go b/internal/cli/cli_test.go
index 7732368..2b45c09 100644
--- a/internal/cli/cli_test.go
+++ b/internal/cli/cli_test.go
@@ -2,6 +2,7 @@ package cli
 
 import (
 	"bytes"
+	"encoding/json"
 	"os"
 	"path/filepath"
 	"strings"
@@ -67,3 +68,45 @@ func TestUnknownDetectorRefused(t *testing.T) {
 		t.Fatalf("exit %d", got)
 	}
 }
+
+func TestDetectorsCatalog(t *testing.T) {
+	c := Config{Tool: "earlylight", Version: "v9.9.9", Summary: "t"}
+	var out, errb bytes.Buffer
+	if got := Run(c, []string{"detectors", "--format", "json"}, &out, &errb); got != 0 {
+		t.Fatalf("exit %d: %s", got, errb.String())
+	}
+	var cat Catalog
+	if err := json.Unmarshal(out.Bytes(), &cat); err != nil {
+		t.Fatalf("not JSON: %v\n%s", err, out.String())
+	}
+	if cat.Schema != CatalogSchema || cat.Tool != "earlylight" || cat.Version != "v9.9.9" {
+		t.Errorf("header = %d %q %q", cat.Schema, cat.Tool, cat.Version)
+	}
+	var e *CatalogEntry
+	for i := range cat.Detectors {
+		if cat.Detectors[i].ID == "t-unsure" {
+			e = &cat.Detectors[i]
+		}
+	}
+	if e == nil {
+		t.Fatalf("t-unsure missing:\n%s", out.String())
+	}
+	if strings.Join(e.Modes, ",") != "fs" || len(e.Kinds) != 1 || e.Kinds[0].ID != "runtime" || e.Kinds[0].Level != "error" {
+		t.Errorf("entry = %+v", e)
+	}
+	// Readers range over lists without checking for null.
+	if strings.Contains(out.String(), "null") {
+		t.Errorf("catalog has a null list:\n%s", out.String())
+	}
+
+	out.Reset()
+	if got := Run(c, []string{"detectors"}, &out, &errb); got != 0 || !strings.Contains(out.String(), "t-unsure") || strings.Contains(out.String(), "{") {
+		t.Errorf("text listing: exit %d\n%s", got, out.String())
+	}
+	for _, args := range [][]string{{"detectors", "--format", "sarif"}, {"detectors", "extra"}, {"detectors", "--nope"}} {
+		errb.Reset()
+		if got := Run(c, args, &out, &errb); got != 2 || errb.Len() == 0 {
+			t.Errorf("%v: exit %d, stderr %q", args, got, errb.String())
+		}
+	}
+}
diff --git a/internal/engine/engine.go b/internal/engine/engine.go
index 1051154..aaad129 100644
--- a/internal/engine/engine.go
+++ b/internal/engine/engine.go
@@ -48,7 +48,8 @@ const (
 type Kind struct {
 	ID    string // stable, used in SARIF rule IDs as "<detector>/<kind>"
 	Title string
-	// Level is the SARIF level for a vulnerable finding: "error" or "warning".
+	// Level is the SARIF level for a vulnerable finding: "error", "warning" or
+	// "note" (something to look at that is not itself a vulnerability).
 	Level string
 	// Description explains the kind in a sentence or two (SARIF fullDescription).
 	Description string