diff --git a/java/ql/src/Security/CWE/CWE-020/OverlyLargeRange.ql b/java/ql/src/Security/CWE/CWE-020/OverlyLargeRange.ql
index b8ea3e52dbd0..5762785949ef 100644
--- a/java/ql/src/Security/CWE/CWE-020/OverlyLargeRange.ql
+++ b/java/ql/src/Security/CWE/CWE-020/OverlyLargeRange.ql
@@ -4,7 +4,7 @@
  *              This may allow an attacker to bypass a filter or sanitizer.
  * @kind problem
  * @problem.severity warning
- * @security-severity 5.0
+ * @security-severity 4.0
  * @precision high
  * @id java/overly-large-range
  * @tags correctness
diff --git a/java/ql/src/Security/CWE/CWE-614/InsecureCookie.ql b/java/ql/src/Security/CWE/CWE-614/InsecureCookie.ql
index b8d64d22e295..44107281feba 100644
--- a/java/ql/src/Security/CWE/CWE-614/InsecureCookie.ql
+++ b/java/ql/src/Security/CWE/CWE-614/InsecureCookie.ql
@@ -4,7 +4,7 @@
  *              interception.
  * @kind problem
  * @problem.severity error
- * @security-severity 5.0
+ * @security-severity 4.0
  * @precision high
  * @id java/insecure-cookie
  * @tags security
diff --git a/java/ql/src/change-notes/2025-10-22-adjust-query-severity.md b/java/ql/src/change-notes/2025-10-22-adjust-query-severity.md
new file mode 100644
index 000000000000..61cc9402a786
--- /dev/null
+++ b/java/ql/src/change-notes/2025-10-22-adjust-query-severity.md
@@ -0,0 +1,5 @@
+---
+category: queryMetadata
+---
+* Reduced the `security-severity` score of the `java/overly-large-range` query from 5.0 to 4.0 to better reflect its impact.
+* Reduced the `security-severity` score of the `java/insecure-cookie` query from 5.0 to 4.0 to better reflect its impact.
\ No newline at end of file
diff --git a/javascript/ql/src/Security/CWE-020/OverlyLargeRange.ql b/javascript/ql/src/Security/CWE-020/OverlyLargeRange.ql
index 582a8975c8f8..c5435e347583 100644
--- a/javascript/ql/src/Security/CWE-020/OverlyLargeRange.ql
+++ b/javascript/ql/src/Security/CWE-020/OverlyLargeRange.ql
@@ -4,7 +4,7 @@
  *              This may allow an attacker to bypass a filter or sanitizer.
  * @kind problem
  * @problem.severity warning
- * @security-severity 5.0
+ * @security-severity 4.0
  * @precision high
  * @id js/overly-large-range
  * @tags correctness
diff --git a/javascript/ql/src/Security/CWE-079/XssThroughDom.ql b/javascript/ql/src/Security/CWE-079/XssThroughDom.ql
index e690e2bab28e..fb8f32cbaca2 100644
--- a/javascript/ql/src/Security/CWE-079/XssThroughDom.ql
+++ b/javascript/ql/src/Security/CWE-079/XssThroughDom.ql
@@ -4,7 +4,7 @@
  *              can lead to a cross-site scripting vulnerability.
  * @kind path-problem
  * @problem.severity warning
- * @security-severity 6.1
+ * @security-severity 7.8
  * @precision high
  * @id js/xss-through-dom
  * @tags security
diff --git a/javascript/ql/src/change-notes/2025-10-22-adjust-query-severity.md b/javascript/ql/src/change-notes/2025-10-22-adjust-query-severity.md
new file mode 100644
index 000000000000..ca81037f44bc
--- /dev/null
+++ b/javascript/ql/src/change-notes/2025-10-22-adjust-query-severity.md
@@ -0,0 +1,5 @@
+---
+category: queryMetadata
+---
+* Increased the `security-severity` score of the `js/xss-through-dom` query from 6.1 to 7.8 to align with other XSS queries.
+* Reduced the `security-severity` score of the `js/overly-large-range` query from 5.0 to 4.0 to better reflect its impact.
\ No newline at end of file
diff --git a/python/ql/src/Security/CWE-020/OverlyLargeRange.ql b/python/ql/src/Security/CWE-020/OverlyLargeRange.ql
index 25acc667430f..94bc74238bcb 100644
--- a/python/ql/src/Security/CWE-020/OverlyLargeRange.ql
+++ b/python/ql/src/Security/CWE-020/OverlyLargeRange.ql
@@ -4,7 +4,7 @@
  *              This may allow an attacker to bypass a filter or sanitizer.
  * @kind problem
  * @problem.severity warning
- * @security-severity 5.0
+ * @security-severity 4.0
  * @precision high
  * @id py/overly-large-range
  * @tags correctness
diff --git a/python/ql/src/change-notes/2025-10-22-adjust-query-severity.md b/python/ql/src/change-notes/2025-10-22-adjust-query-severity.md
new file mode 100644
index 000000000000..bc314358a6f8
--- /dev/null
+++ b/python/ql/src/change-notes/2025-10-22-adjust-query-severity.md
@@ -0,0 +1,4 @@
+---
+category: queryMetadata
+---
+* Reduced the `security-severity` score of the `py/overly-large-range` query from 5.0 to 4.0 to better reflect its impact.
\ No newline at end of file
diff --git a/ruby/ql/src/change-notes/2025-10-22-adjust-query-severity.md b/ruby/ql/src/change-notes/2025-10-22-adjust-query-severity.md
new file mode 100644
index 000000000000..4da73769e279
--- /dev/null
+++ b/ruby/ql/src/change-notes/2025-10-22-adjust-query-severity.md
@@ -0,0 +1,4 @@
+---
+category: queryMetadata
+---
+* Reduced the `security-severity` score of the `rb/overly-large-range` query from 5.0 to 4.0 to better reflect its impact. 
\ No newline at end of file
diff --git a/ruby/ql/src/queries/security/cwe-020/OverlyLargeRange.ql b/ruby/ql/src/queries/security/cwe-020/OverlyLargeRange.ql
index 62b088355b54..6f0f529a31dd 100644
--- a/ruby/ql/src/queries/security/cwe-020/OverlyLargeRange.ql
+++ b/ruby/ql/src/queries/security/cwe-020/OverlyLargeRange.ql
@@ -4,7 +4,7 @@
  *              This may allow an attacker to bypass a filter or sanitizer.
  * @kind problem
  * @problem.severity warning
- * @security-severity 5.0
+ * @security-severity 4.0
  * @precision high
  * @id rb/overly-large-range
  * @tags correctness