diff --git a/lib/util/vulnerability/utils.spec.ts b/lib/util/vulnerability/utils.spec.ts
index 1d1935ad54..a69cf4bb3f 100644
--- a/lib/util/vulnerability/utils.spec.ts
+++ b/lib/util/vulnerability/utils.spec.ts
@@ -196,6 +196,8 @@ describe('util/vulnerability/utils', () => {
 
   describe('getFixedVersionConstraint()', () => {
     it.each([
+      // checked in a case-insensitive manner
+      ['MAVEn', '[1.2.3,)'],
       ['Maven', '[1.2.3,)'],
       ['NuGet', '[1.2.3,)'],
       ['maven', '[1.2.3,)'],
@@ -216,6 +218,8 @@ describe('util/vulnerability/utils', () => {
       ['NuGet', '> 1.2.3'],
       ['npm', '> 1.2.3'],
       ['Go', '> 1.2.3'],
+      // checked in a case-insensitive manner
+      ['gO', '> 1.2.3'],
     ])('returns correct range for %s', (ecosystem, expected) => {
       expect(getLastAffectedVersionConstraint('1.2.3', ecosystem)).toBe(
         expected,
diff --git a/lib/util/vulnerability/utils.ts b/lib/util/vulnerability/utils.ts
index 6ce93ca229..2de5395262 100644
--- a/lib/util/vulnerability/utils.ts
+++ b/lib/util/vulnerability/utils.ts
@@ -5,8 +5,6 @@ import { NugetDatasource } from '../../modules/datasource/nuget/index.ts';
  * Ecosystems/datasources that use Maven-style inclusive ranges for fixed versions: `[version,)`
  */
 const mavenStyleFixedEcosystems = new Set([
-  'Maven',
-  'NuGet',
   MavenDatasource.id,
   NugetDatasource.id,
 ]);
@@ -14,19 +12,19 @@ const mavenStyleFixedEcosystems = new Set([
 /**
  * Ecosystems/datasources that use Maven-style exclusive ranges for last-affected versions: `(version,)`
  */
-const mavenStyleLastAffectedEcosystems = new Set(['Maven', MavenDatasource.id]);
+const mavenStyleLastAffectedEcosystems = new Set([MavenDatasource.id]);
 
 /**
  * Formats a fixed version as an allowed-version constraint appropriate for the ecosystem.
  *
  * @param fixedVersion - The first version that contains the fix
- * @param ecosystem - Ecosystem or datasource name (e.g., 'Maven', 'npm', 'maven', 'nuget'). Checked in a case-sensitive manner.
+ * @param ecosystem - Ecosystem or datasource name (e.g., 'maven', 'npm', 'nuget'). Checked in a case-insensitive manner.
  */
 export function getFixedVersionConstraint(
   fixedVersion: string,
   ecosystem: string,
 ): string {
-  if (mavenStyleFixedEcosystems.has(ecosystem)) {
+  if (mavenStyleFixedEcosystems.has(ecosystem.toLowerCase())) {
     return `[${fixedVersion},)`;
   }
   return `>= ${fixedVersion}`;
@@ -36,13 +34,13 @@ export function getFixedVersionConstraint(
  * Formats a last-affected version as an allowed-version constraint appropriate for the ecosystem.
  *
  * @param lastAffected - The last version known to be affected
- * @param ecosystem - Ecosystem or datasource name. Checked in a case-sensitive manner.
+ * @param ecosystem - Ecosystem or datasource name. Checked in a case-insensitive manner.
  */
 export function getLastAffectedVersionConstraint(
   lastAffected: string,
   ecosystem: string,
 ): string {
-  if (mavenStyleLastAffectedEcosystems.has(ecosystem)) {
+  if (mavenStyleLastAffectedEcosystems.has(ecosystem.toLowerCase())) {
     return `(${lastAffected},)`;
   }
   return `> ${lastAffected}`;