diff --git a/Jenkinsfile b/Jenkinsfile
index 9c3a50f..88d7eb7 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -107,8 +107,12 @@ function unescapeXml(value) {
 }
 
 function attr(attrs, name) {
-  const match = attrs.match(new RegExp(`(?:^|\\s)${name}="([^"]*)"`));
-  return match ? unescapeXml(match[1]) : '';
+  const needle = `${name}="`;
+  const start = attrs.indexOf(needle);
+  if (start < 0) return '';
+  const valueStart = start + needle.length;
+  const valueEnd = attrs.indexOf('"', valueStart);
+  return valueEnd < 0 ? '' : unescapeXml(attrs.slice(valueStart, valueEnd));
 }
 
 function collectSourceFiles(rootDir) {
@@ -134,7 +138,7 @@ function collectSourceFiles(rootDir) {
 }
 
 function categoryForClassname(classname) {
-  const normalized = String(classname || '').split('\\').join('/');
+  const normalized = String(classname || '').split(String.fromCharCode(92)).join('/');
   const relative = normalized.includes('/tests/')
     ? normalized.slice(normalized.indexOf('/tests/') + '/tests/'.length)
     : (normalized.startsWith('tests/') ? normalized.slice('tests/'.length) : normalized);
@@ -147,7 +151,7 @@ function categoryForClassname(classname) {
 
 function parseTestCases(junit) {
   const cases = [];
-  const re = new RegExp('<testcase\\b([^>]*)>([\\s\\S]*?)</testcase>|<testcase\\b([^>]*)/>', 'g');
+  const re = new RegExp('<testcase([^>]*)>(.*?)</testcase>|<testcase([^>]*)/>', 'gs');
   let match;
   while ((match = re.exec(junit)) !== null) {
     const attrs = match[1] || match[3] || '';
@@ -174,7 +178,7 @@ const cov = fs.existsSync(coveragePath) ? JSON.parse(fs.readFileSync(coveragePat
 const total = cov.total || {};
 const sourceFiles = sourceRoots.flatMap((root) => collectSourceFiles(root));
 const overLimitFiles = sourceFiles
-  .map((file) => ({ file, lines: fs.readFileSync(file, 'utf8').split(new RegExp('\\r?\\n')).length }))
+  .map((file) => ({ file, lines: fs.readFileSync(file, 'utf8').split(String.fromCharCode(10)).length }))
   .filter((item) => item.lines > 500);
 
 const report = {
@@ -310,9 +314,9 @@ const sourceLinesOver500 = Number(quality.hygiene?.sourceLinesOver500 ?? 0);
 
 function esc(value) {
   return String(value ?? '')
-    .split('\\').join('\\\\')
-    .split('"').join('\\"')
-    .split('\n').join('\\n');
+    .split(String.fromCharCode(92)).join(String.fromCharCode(92, 92))
+    .split('"').join(String.fromCharCode(92) + '"')
+    .split(String.fromCharCode(10)).join(String.fromCharCode(92) + 'n');
 }
 
 function labelString(labels) {
@@ -322,10 +326,16 @@ function labelString(labels) {
 function fetchCounter(targetStatus) {
   try {
     const metrics = execSync(`curl -fsS ${gateway}/metrics`, { encoding: 'utf8' });
-    const re = new RegExp(`platform_quality_gate_runs_total\\{[^}]*suite=\\"${suite}\\"[^}]*status=\\"${targetStatus}\\"[^}]*\\}\\s+(\\d+(?:\\.\\d+)?)`);
-    const match = metrics.match(re);
-    if (!match) return 0;
-    return Number(match[1]);
+    for (const line of metrics.split(String.fromCharCode(10))) {
+      if (
+        line.startsWith('platform_quality_gate_runs_total{') &&
+        line.includes(`suite="${suite}"`) &&
+        line.includes(`status="${targetStatus}"`)
+      ) {
+        return Number(line.trim().split(' ').filter(Boolean).pop() || 0);
+      }
+    }
+    return 0;
   } catch {
     return 0;
   }
@@ -392,7 +402,7 @@ const lines = [
 
 try {
   execSync(`curl -fsS --data-binary @- ${gateway}/metrics/job/platform-quality-ci/suite/${suite}`, {
-    input: lines.join('\\n'),
+    input: lines.join(String.fromCharCode(10)),
     stdio: ['pipe', 'inherit', 'inherit']
   });
 } catch (error) {