diff --git a/packages/build-info/src/frameworks/framework.test.ts b/packages/build-info/src/frameworks/framework.test.ts
index c85b370a57..119f647cea 100644
--- a/packages/build-info/src/frameworks/framework.test.ts
+++ b/packages/build-info/src/frameworks/framework.test.ts
@@ -7,7 +7,13 @@ import { Environment } from '../file-system.js'
 import { NodeFS } from '../node/file-system.js'
 import { Project } from '../project.js'
 
-import { Accuracy, DetectedFramework, mergeDetections, sortFrameworksBasedOnAccuracy } from './framework.js'
+import {
+  Accuracy,
+  type DetectedFramework,
+  VersionAccuracy,
+  mergeDetections,
+  sortFrameworksBasedOnAccuracy,
+} from './framework.js'
 import { Grunt } from './grunt.js'
 import { Gulp } from './gulp.js'
 import { Hexo } from './hexo.js'
@@ -180,6 +186,94 @@ describe('detect framework version', () => {
   })
 })
 
+describe('detected framework version accuracy', () => {
+  test('should mark pinned version from package.json with medium accuracy', async ({ fs }) => {
+    const cwd = mockFileSystem({
+      'package.json': JSON.stringify({ devDependencies: { '@11ty/eleventy': '2.0.0' } }),
+    })
+    const project = new Project(fs, cwd)
+    const detection = await project.detectFrameworks()
+    expect(detection).toHaveLength(1)
+    expect(detection?.[0].detected.package?.versionAccuracy).toBe(VersionAccuracy.PackageJSONPinned)
+    expect(detection?.[0].toJSON().package).toMatchObject({
+      name: '@11ty/eleventy',
+      version: '2.0.0',
+      versionAccuracy: VersionAccuracy.PackageJSONPinned,
+    })
+  })
+
+  test('should mark range version from package.json with low accuracy', async ({ fs }) => {
+    const cwd = mockFileSystem({
+      'package.json': JSON.stringify({ devDependencies: { '@11ty/eleventy': '^2.0.0' } }),
+    })
+    const project = new Project(fs, cwd)
+    const detection = await project.detectFrameworks()
+    expect(detection).toHaveLength(1)
+    expect(detection?.[0].detected.package?.versionAccuracy).toBe(VersionAccuracy.PackageJSON)
+    expect(detection?.[0].toJSON().package).toMatchObject({
+      name: '@11ty/eleventy',
+      version: '2.0.0',
+      versionAccuracy: VersionAccuracy.PackageJSON,
+    })
+  })
+
+  test('should mark version from node_modules with high accuracy', async ({ fs }) => {
+    const cwd = mockFileSystem({
+      'package.json': JSON.stringify({ devDependencies: { '@11ty/eleventy': '^2.0.0' } }),
+      'node_modules/@11ty/eleventy/package.json': JSON.stringify({ version: '2.0.1' }),
+    })
+    const project = new Project(fs, cwd)
+    const detection = await project.detectFrameworks()
+    expect(detection).toHaveLength(1)
+    expect(detection?.[0].detected.package?.versionAccuracy).toBe(VersionAccuracy.NodeModules)
+    expect(detection?.[0].toJSON().package).toMatchObject({
+      name: '@11ty/eleventy',
+      version: '2.0.1',
+      versionAccuracy: VersionAccuracy.NodeModules,
+    })
+  })
+
+  test('should not set version accuracy if no version is detected', async ({ fs }) => {
+    const cwd = mockFileSystem({
+      'package.json': JSON.stringify({ devDependencies: { '@11ty/eleventy': 'latest' } }),
+    })
+    const project = new Project(fs, cwd)
+    const detection = await project.detectFrameworks()
+    expect(detection).toHaveLength(1)
+    expect(detection?.[0].detected.package?.versionAccuracy).toBeUndefined()
+    expect(detection?.[0].toJSON().package.versionAccuracy).toBeUndefined()
+  })
+
+  test('should not set version accuracy for non-node.js frameworks', async ({ fs }) => {
+    const cwd = mockFileSystem({
+      'config.rb': '', // Middleman framework (no npm dependencies)
+    })
+    const project = new Project(fs, cwd)
+    const detection = await project.detectFrameworks()
+    expect(detection).toHaveLength(1)
+    expect(detection?.[0].detected.package).toBeUndefined()
+    expect(detection?.[0].toJSON().package).toMatchObject({
+      version: 'unknown',
+      versionAccuracy: undefined,
+    })
+  })
+
+  test('should fall back to package.json accuracy in browser environment', async ({ fs }) => {
+    const cwd = mockFileSystem({
+      'package.json': JSON.stringify({ devDependencies: { '@11ty/eleventy': '^2.0.0' } }),
+    })
+    vi.spyOn(fs, 'getEnvironment').mockImplementation(() => Environment.Browser)
+    const project = new Project(fs, cwd)
+    const detection = await project.detectFrameworks()
+    expect(detection).toHaveLength(1)
+    expect(detection?.[0].detected.package?.versionAccuracy).toBe(VersionAccuracy.PackageJSON)
+    expect(detection?.[0].toJSON().package).toMatchObject({
+      version: '2.0.0',
+      versionAccuracy: VersionAccuracy.PackageJSON,
+    })
+  })
+})
+
 describe('detection merging', () => {
   test('return undefined if no detection is provided', () => {
     expect(mergeDetections([undefined, undefined])).toBeUndefined()
diff --git a/packages/build-info/src/frameworks/framework.ts b/packages/build-info/src/frameworks/framework.ts
index d9107854bb..64d64f267b 100644
--- a/packages/build-info/src/frameworks/framework.ts
+++ b/packages/build-info/src/frameworks/framework.ts
@@ -20,6 +20,12 @@ export enum Accuracy {
   NPMHoisted = 1, // Matched the npm dependency but in a folder up the provided path
 }
 
+export enum VersionAccuracy {
+  NodeModules = 'node_modules', // High accuracy: read from installed package in node_modules
+  PackageJSONPinned = 'package_json_pinned', // Medium accuracy: exact pinned version from package.json (e.g., "1.2.3")
+  PackageJSON = 'package_json', // Low accuracy: parsed from package.json dependency range (e.g., "^1.2.3")
+}
+
 export type PollingStrategy = {
   // TODO(serhalp) Define an enum
   name: string
@@ -33,7 +39,11 @@ export type Detection = {
    */
   accuracy: Accuracy
   /** The NPM package that was able to detect it (high accuracy) */
-  package?: { name: string; version?: SemVer }
+  package?: {
+    name: string
+    version?: SemVer
+    versionAccuracy?: VersionAccuracy
+  }
   packageJSON?: Partial<PackageJson>
   /** The absolute path to config file that is associated with the framework */
   config?: string
@@ -93,6 +103,7 @@ export interface Framework {
     package: {
       name?: string // if detected via config file the name can be empty
       version: string | 'unknown'
+      versionAccuracy?: VersionAccuracy
     }
     dev: {
       commands: string[]
@@ -249,19 +260,50 @@ export abstract class BaseFramework implements Framework {
   /** check if the npmDependencies are used inside the provided package.json */
   private async npmDependenciesUsed(
     pkgJSON: Partial<PackageJson>,
-  ): Promise<{ name: string; version?: SemVer } | undefined> {
-    const allDeps = [...Object.entries(pkgJSON.dependencies || {}), ...Object.entries(pkgJSON.devDependencies || {})]
+  ): Promise<{ name: string; version?: SemVer; versionAccuracy?: VersionAccuracy } | undefined> {
+    const allDeps = {
+      ...(pkgJSON.dependencies ?? {}),
+      ...(pkgJSON.devDependencies ?? {}),
+    }
+    const matchedDepName = Object.keys(allDeps).find((depName) => this.npmDependencies.includes(depName))
+    const hasExcludedDeps = Object.keys(allDeps).some((depName) => this.excludedNpmDependencies.includes(depName))
+
+    if (!hasExcludedDeps && matchedDepName != null) {
+      const versionFromNodeModules = await this.getVersionFromNodeModules(matchedDepName)
+      if (versionFromNodeModules) {
+        return {
+          name: matchedDepName,
+          version: versionFromNodeModules,
+          versionAccuracy: VersionAccuracy.NodeModules,
+        }
+      }
 
-    const found = allDeps.find(([depName]) => this.npmDependencies.includes(depName))
-    // check for excluded dependencies
-    const excluded = allDeps.some(([depName]) => this.excludedNpmDependencies.includes(depName))
+      const matchedDepVersion = allDeps[matchedDepName]
+
+      // Try to parse without coercing first to detect pinned versions (e.g., "1.2.3")
+      const pinnedVersion = parse(matchedDepVersion)
+      if (pinnedVersion) {
+        return {
+          name: matchedDepName,
+          version: pinnedVersion,
+          versionAccuracy: VersionAccuracy.PackageJSONPinned,
+        }
+      }
+
+      // Coerce to parse syntax like ~0.1.2 or ^1.2.3
+      const coercedVersion = parse(coerce(matchedDepVersion)) || undefined
+      if (coercedVersion) {
+        return {
+          name: matchedDepName,
+          version: coercedVersion,
+          versionAccuracy: VersionAccuracy.PackageJSON,
+        }
+      }
 
-    if (!excluded && found?.[0]) {
-      const version = await this.getVersionFromNodeModules(found[0])
       return {
-        name: found[0],
-        // coerce to parse syntax like ~0.1.2 or ^1.2.3
-        version: version || parse(coerce(found[1])) || undefined,
+        name: matchedDepName,
+        version: undefined,
+        versionAccuracy: undefined,
       }
     }
   }
@@ -367,6 +409,7 @@ export abstract class BaseFramework implements Framework {
       package: {
         name: this.detected?.package?.name || this.npmDependencies?.[0],
         version: this.detected?.package?.version?.raw || 'unknown',
+        versionAccuracy: this.detected?.package?.versionAccuracy,
       },
       category: this.category,
       dev: {
diff --git a/packages/build-info/src/index.ts b/packages/build-info/src/index.ts
index d5519cbfe3..c94e4d3bc5 100644
--- a/packages/build-info/src/index.ts
+++ b/packages/build-info/src/index.ts
@@ -1,6 +1,12 @@
 export * from './file-system.js'
 export * from './logger.js'
-export type { Category, DetectedFramework, FrameworkInfo, PollingStrategy } from './frameworks/framework.js'
+export type {
+  Category,
+  DetectedFramework,
+  FrameworkInfo,
+  PollingStrategy,
+  VersionAccuracy,
+} from './frameworks/framework.js'
 export * from './get-framework.js'
 export * from './project.js'
 export * from './settings/get-build-settings.js'
diff --git a/packages/build-info/src/node/__snapshots__/get-build-info.test.ts.snap b/packages/build-info/src/node/__snapshots__/get-build-info.test.ts.snap
index e1f62ce41b..253c43adbf 100644
--- a/packages/build-info/src/node/__snapshots__/get-build-info.test.ts.snap
+++ b/packages/build-info/src/node/__snapshots__/get-build-info.test.ts.snap
@@ -144,6 +144,7 @@ exports[`should retrieve the build info for providing a rootDir and a nested pro
       "package": {
         "name": "astro",
         "version": "1.5.1",
+        "versionAccuracy": "package_json",
       },
       "plugins": [],
       "staticAssetsDirectory": "public",