update: drop number of vulnerabilities on --pre-release

lib/security-release/security-release.js

@@ -11,6 +11,20 @@ export const NEXT_SECURITY_RELEASE_REPOSITORY = {
   repo: 'security-release'
 };
 
+const SEVERITY_RANK = {
+  low: 0,
+  medium: 1,
+  high: 2,
+  critical: 3
+};
+
+const SEVERITY_LABEL = {
+  critical: 'CRITICAL',
+  high: 'HIGH',
+  medium: 'MEDIUM',
+  low: 'LOW'
+};
+
 export const PLACEHOLDERS = {
   releaseDate: '%RELEASE_DATE%',
   vulnerabilitiesPRURL: '%VULNERABILITIES_PR_URL%',
@@ -130,6 +144,27 @@ export function formatDateToYYYYMMDD(date) {
   return `${year}/${month}/${day}`;
 }
 
+export function getHighestSeverity(reports) {
+  let highestSeverity = '';
+  let highestRank = -1;
+
+  for (const report of reports) {
+    const rating = report.severity.rating;
+    const currentRank = SEVERITY_RANK[rating] ?? -1;
+
+    if (currentRank > highestRank) {
+      highestSeverity = rating;
+      highestRank = currentRank;
+    }
+  }
+
+  return SEVERITY_LABEL[highestSeverity] ?? 'NONE';
+}
+
+export function getHighestSeverityAnnouncement(reports) {
+  return `The highest severity issue fixed in this release is ${getHighestSeverity(reports)}.`;
+}
+
 export function promptDependencies(cli) {
   return cli.prompt('Enter the link to the dependency update PR (leave empty to exit): ', {
     defaultAnswer: '',

lib/security_blog.js

@@ -1,13 +1,14 @@
 import fs from 'node:fs';
 import path from 'node:path';
-import _ from 'lodash';
 import nv from '@pkgjs/nv';
 import {
   PLACEHOLDERS,
   checkoutOnSecurityReleaseBranch,
   validateDate,
   SecurityRelease,
   commitAndPushVulnerabilitiesJSON,
+  getHighestSeverity,
+  getHighestSeverityAnnouncement,
 } from './security-release/security-release.js';
 import auth from './auth.js';
 import Request from './request.js';
@@ -38,7 +39,7 @@ export default class SecurityBlog extends SecurityRelease {
       annoucementDate: await this.getAnnouncementDate(cli),
       releaseDate: this.formatReleaseDate(releaseDate),
       affectedVersions: this.getAffectedVersions(content),
-      vulnerabilities: this.getVulnerabilities(content),
+      vulnerabilities: this.getPreReleaseVulnerabilities(content),
       slug: this.getSlug(releaseDate),
       impact: this.getImpact(content)
     };
@@ -323,6 +324,11 @@ export default class SecurityBlog extends SecurityRelease {
   getImpact(content) {
     const impact = new Map();
     for (const report of content.reports) {
+      if (!report.severity?.rating) {
+        this.cli.error(`severity.rating not found for report ${report.id}.`);
+        process.exit(1);
+      }
+
       for (const version of report.affectedVersions) {
         if (!impact.has(version)) impact.set(version, []);
         impact.get(version).push(report);
@@ -332,37 +338,46 @@ export default class SecurityBlog extends SecurityRelease {
     const result = Array.from(impact.entries())
       .sort(([a], [b]) => b.localeCompare(a)) // DESC
       .map(([version, reports]) => {
-        const severityCount = new Map();
-
-        for (const report of reports) {
-          const rating = report.severity.rating?.toLowerCase();
-          if (!rating) {
-            this.cli.error(`severity.rating not found for report ${report.id}.`);
-            process.exit(1);
-          }
-          severityCount.set(rating, (severityCount.get(rating) || 0) + 1);
-        }
-
-        const groupedByRating = Array.from(severityCount.entries())
-          .map(([rating, count]) => `${count} ${rating} severity issues`)
-          .join(', ');
-
-        return `The ${version} release line of Node.js is vulnerable to ${groupedByRating}.`;
+        return `The highest severity issue fixed in the ${version} release line is ` +
+          `${getHighestSeverity(reports)}.`;
       })
       .join('\n');
 
     return result;
   }
 
   getVulnerabilities(content) {
-    const grouped = _.groupBy(content.reports, 'severity.rating');
+    const severityCount = new Map();
+
+    for (const report of content.reports) {
+      if (!report.severity?.rating) {
+        this.cli.error(`severity.rating not found for report ${report.id}.`);
+        process.exit(1);
+      }
+
+      const rating = report.severity.rating;
+      severityCount.set(rating, (severityCount.get(rating) || 0) + 1);
+    }
+
     const text = [];
-    for (const [key, value] of Object.entries(grouped)) {
-      text.push(`- ${value.length} ${key.toLocaleLowerCase()} severity issues.`);
+    for (const [rating, count] of severityCount) {
+      text.push(`- ${count} ${rating} severity issues.`);
     }
+
     return text.join('\n');
   }
 
+  getPreReleaseVulnerabilities(content) {
+    for (const report of content.reports) {
+      if (!report.severity?.rating) {
+        this.cli.error(`severity.rating not found for report ${report.id}.`);
+        process.exit(1);
+      }
+    }
+
+    return getHighestSeverityAnnouncement(content.reports);
+  }
+
   getSecurityPreReleaseTemplate() {
     return fs.readFileSync(
       new URL(

test/unit/security_release.test.js

@@ -0,0 +1,196 @@
+import { describe, it } from 'node:test';
+import assert from 'node:assert';
+
+import SecurityBlog from '../../lib/security_blog.js';
+import {
+  getHighestSeverity,
+  getHighestSeverityAnnouncement
+} from '../../lib/security-release/security-release.js';
+
+const cli = {
+  error() {}
+};
+
+function assertExits(fn) {
+  const originalExit = process.exit;
+  process.exit = () => {
+    throw new Error('process.exit');
+  };
+
+  try {
+    assert.throws(fn, /process\.exit/);
+  } finally {
+    process.exit = originalExit;
+  }
+}
+
+function report(id, rating, affectedVersions = ['24.x']) {
+  return {
+    id,
+    severity: { rating },
+    affectedVersions
+  };
+}
+
+describe('security_release: severity announcement', () => {
+  it('uses the highest severity across reports', () => {
+    const reports = [
+      report(1, 'low'),
+      report(2, 'medium'),
+      report(3, 'high')
+    ];
+
+    assert.strictEqual(getHighestSeverity(reports), 'HIGH');
+    assert.strictEqual(
+      getHighestSeverityAnnouncement(reports),
+      'The highest severity issue fixed in this release is HIGH.'
+    );
+  });
+
+  it('uses medium severity wording', () => {
+    const reports = [
+      report(1, 'low'),
+      report(2, 'medium')
+    ];
+
+    assert.strictEqual(getHighestSeverity(reports), 'MEDIUM');
+    assert.strictEqual(
+      getHighestSeverityAnnouncement(reports),
+      'The highest severity issue fixed in this release is MEDIUM.'
+    );
+  });
+
+  it('ignores invalid severity ratings', () => {
+    const reports = [
+      report(1, 'low'),
+      report(2, 'hypercritical'),
+      report(3, 'medium')
+    ];
+
+    assert.strictEqual(getHighestSeverity(reports), 'MEDIUM');
+  });
+});
+
+describe('security_blog: pre-release severity wording', () => {
+  it('does not include severity counts in the summary', () => {
+    const blog = new SecurityBlog(cli);
+    const content = {
+      reports: [
+        report(1, 'low'),
+        report(2, 'medium')
+      ]
+    };
+
+    assert.strictEqual(
+      blog.getPreReleaseVulnerabilities(content),
+      'The highest severity issue fixed in this release is MEDIUM.'
+    );
+  });
+
+  it('uses the highest severity per release line in impact text', () => {
+    const blog = new SecurityBlog(cli);
+    const content = {
+      reports: [
+        report(1, 'low', ['22.x', '20.x']),
+        report(2, 'medium', ['22.x']),
+        report(3, 'high', ['20.x'])
+      ]
+    };
+
+    assert.strictEqual(
+      blog.getImpact(content),
+      'The highest severity issue fixed in the 22.x release line is MEDIUM.\n' +
+        'The highest severity issue fixed in the 20.x release line is HIGH.'
+    );
+  });
+
+  it('replaces the pre-release template placeholder with the highest severity sentence', () => {
+    const blog = new SecurityBlog(cli);
+    const template = blog.getSecurityPreReleaseTemplate();
+    const preRelease = blog.buildPreRelease(template, {
+      annoucementDate: '2026-06-01T00:00:00.000Z',
+      releaseDate: 'Tuesday, June 2, 2026',
+      affectedVersions: '24.x, 22.x',
+      vulnerabilities: blog.getPreReleaseVulnerabilities({
+        reports: [
+          report(1, 'low'),
+          report(2, 'high')
+        ]
+      }),
+      slug: 'june-2026-security-releases',
+      impact: 'The highest severity issue fixed in the 24.x release line is HIGH.'
+    });
+
+    assert.match(
+      preRelease,
+      /The highest severity issue fixed in this release is HIGH\./
+    );
+    assert.doesNotMatch(preRelease, /%VULNERABILITIES%/);
+  });
+
+  it('exits when a report is missing a severity rating', () => {
+    const errors = [];
+    const blog = new SecurityBlog({
+      error(message) {
+        errors.push(message);
+      }
+    });
+    const content = {
+      reports: [
+        {
+          id: 1,
+          severity: {},
+          affectedVersions: ['24.x']
+        }
+      ]
+    };
+
+    assertExits(() => blog.getPreReleaseVulnerabilities(content));
+    assertExits(() => blog.getImpact(content));
+    assert.deepStrictEqual(errors, [
+      'severity.rating not found for report 1.',
+      'severity.rating not found for report 1.'
+    ]);
+  });
+});
+
+describe('security_blog: post-release severity wording', () => {
+  it('keeps the vulnerability count list', () => {
+    const blog = new SecurityBlog(cli);
+    const content = {
+      reports: [
+        report(1, 'low'),
+        report(2, 'medium'),
+        report(3, 'medium')
+      ]
+    };
+
+    assert.strictEqual(
+      blog.getVulnerabilities(content),
+      '- 1 low severity issues.\n- 2 medium severity issues.'
+    );
+  });
+
+  it('exits when a report is missing a severity rating', () => {
+    const errors = [];
+    const blog = new SecurityBlog({
+      error(message) {
+        errors.push(message);
+      }
+    });
+    const content = {
+      reports: [
+        {
+          id: 1,
+          severity: {},
+          affectedVersions: ['24.x']
+        }
+      ]
+    };
+
+    assertExits(() => blog.getVulnerabilities(content));
+    assert.deepStrictEqual(errors, [
+      'severity.rating not found for report 1.'
+    ]);
+  });
+});