diff --git a/package-lock.json b/package-lock.json
index 435704e..5c582ee 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,7 @@
         "@sasjs/utils": "^3.5.6",
         "axios": "1.16.0",
         "axios-cookiejar-support": "5.0.5",
-        "form-data": "4.0.4",
+        "form-data": "4.0.6",
         "https": "1.0.0",
         "tough-cookie": "4.1.3"
       },
@@ -3556,22 +3556,6 @@
         "tough-cookie": ">=4.0.0"
       }
     },
-    "node_modules/axios/node_modules/form-data": {
-      "version": "4.0.5",
-      "resolved": "https://registry.npmjs.org/form-data/-/form-data-4.0.5.tgz",
-      "integrity": "sha512-8RipRLol37bNs2bhoV67fiTEvdTrbMUYcFTiy3+wuuOnUog2QBHCZWXDRijWQfAkhBj2Uf5UnVaiWwA5vdd82w==",
-      "license": "MIT",
-      "dependencies": {
-        "asynckit": "^0.4.0",
-        "combined-stream": "^1.0.8",
-        "es-set-tostringtag": "^2.1.0",
-        "hasown": "^2.0.2",
-        "mime-types": "^2.1.12"
-      },
-      "engines": {
-        "node": ">= 6"
-      }
-    },
     "node_modules/babel-jest": {
       "version": "29.7.0",
       "resolved": "https://registry.npmjs.org/babel-jest/-/babel-jest-29.7.0.tgz",
@@ -6179,16 +6163,16 @@
       }
     },
     "node_modules/form-data": {
-      "version": "4.0.4",
-      "resolved": "https://registry.npmjs.org/form-data/-/form-data-4.0.4.tgz",
-      "integrity": "sha512-KrGhL9Q4zjj0kiUt5OO4Mr/A/jlI2jDYs5eHBpYHPcBEVSiipAvn2Ko2HnPe20rmcuuvMHNdZFp+4IlGTMF0Ow==",
+      "version": "4.0.6",
+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-4.0.6.tgz",
+      "integrity": "sha512-vKatAh4SlVfgbv+YtmhiRjhEMJsYpsG1Y2rMQtR+SVSbytsSD1YGzDIcrAJmdFec88u/+VoGmxnl+80gL1tRCQ==",
       "license": "MIT",
       "dependencies": {
         "asynckit": "^0.4.0",
         "combined-stream": "^1.0.8",
         "es-set-tostringtag": "^2.1.0",
-        "hasown": "^2.0.2",
-        "mime-types": "^2.1.12"
+        "hasown": "^2.0.4",
+        "mime-types": "^2.1.35"
       },
       "engines": {
         "node": ">= 6"
@@ -6616,7 +6600,9 @@
       }
     },
     "node_modules/hasown": {
-      "version": "2.0.2",
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/hasown/-/hasown-2.0.4.tgz",
+      "integrity": "sha512-T2UbfbBEF32wiepXIsMlTW9+dDYC6wMh/t/vYA4tuOMKqWz/n3vr1NFSxQiyP+zk2mXsoMA/i/7qV6LKut1t1A==",
       "license": "MIT",
       "dependencies": {
         "function-bind": "^1.1.2"
diff --git a/package.json b/package.json
index df9d846..36a9b37 100644
--- a/package.json
+++ b/package.json
@@ -79,7 +79,7 @@
     "@sasjs/utils": "^3.5.6",
     "axios": "1.16.0",
     "axios-cookiejar-support": "5.0.5",
-    "form-data": "4.0.4",
+    "form-data": "4.0.6",
     "https": "1.0.0",
     "tough-cookie": "4.1.3"
   }
diff --git a/src/auth/AuthManager.ts b/src/auth/AuthManager.ts
index a1f5355d9..fc3df2e 100644
--- a/src/auth/AuthManager.ts
+++ b/src/auth/AuthManager.ts
@@ -375,7 +375,7 @@ export class AuthManager {
    *
    */
   public async logOut() {
-    this.requestClient.clearCsrfTokens()
+    this.requestClient.resetInMemoryAuthState()
 
     return this.requestClient.get(this.logoutUrl, undefined).then(() => true)
   }
diff --git a/src/request/RequestClient.ts b/src/request/RequestClient.ts
index 82ba21b..6b61a02 100644
--- a/src/request/RequestClient.ts
+++ b/src/request/RequestClient.ts
@@ -28,6 +28,9 @@ import {
 import { InvalidSASjsCsrfError } from '../types/errors/InvalidSASjsCsrfError'
 import { inspect } from 'util'
 
+const getLogger = () =>
+  (typeof process !== 'undefined' && process.logger) || console
+
 export class RequestClient implements HttpClient {
   private requests: SASjsRequest[] = []
   private requestsLimit: number = 10
@@ -37,6 +40,7 @@ export class RequestClient implements HttpClient {
   protected csrfToken: CsrfToken = { headerName: '', value: '' }
   protected fileUploadCsrfToken: CsrfToken | undefined
   protected httpClient!: AxiosInstance
+  private isRecoveringFromNetworkError = false
 
   constructor(
     protected baseUrl: string,
@@ -77,6 +81,25 @@ export class RequestClient implements HttpClient {
     localStorage.setItem('refreshToken', '')
   }
 
+  public resetInMemoryAuthState() {
+    this.clearCsrfTokens()
+    if (typeof localStorage !== 'undefined') {
+      this.clearLocalStorageTokens()
+    }
+    if (typeof document !== 'undefined') {
+      this.clearAllCookies()
+    }
+  }
+
+  private clearAllCookies() {
+    const cookies = document.cookie.split(';')
+    for (const cookie of cookies) {
+      const name = cookie.split('=')[0].trim()
+      if (!name) continue
+      document.cookie = `${name}=; Max-Age=0; Path=/;`
+    }
+  }
+
   public getBaseUrl() {
     return this.httpClient.defaults.baseURL || ''
   }
@@ -354,6 +377,7 @@ export class RequestClient implements HttpClient {
     const csrfTokenKey = Object.keys(params).find((k) =>
       k?.toLowerCase().includes('csrf')
     )
+
     if (csrfTokenKey) {
       this.csrfToken.value = params[csrfTokenKey]
       this.csrfToken.headerName = this.csrfToken.headerName || 'x-csrf-token'
@@ -378,7 +402,7 @@ export class RequestClient implements HttpClient {
       })
       .then((res) => res.data)
       .catch((error) => {
-        const logger = process.logger || console
+        const logger = getLogger()
         logger.error(error)
       })
   }
@@ -687,6 +711,45 @@ ${resHeaders}${parsedResBody ? `\n\n${parsedResBody}` : ''}
       throw new CertificateError(e.message)
     }
 
+    if (
+      e.isAxiosError &&
+      !response &&
+      e.code === 'ERR_NETWORK' &&
+      !this.isRecoveringFromNetworkError
+    ) {
+      // Opaque ERR_NETWORK usually means the server rejected stale credentials.
+      // Wipe in-memory auth state, re-establish session via GET /,
+      // then retry the original request.
+      this.resetInMemoryAuthState()
+      this.isRecoveringFromNetworkError = true
+      try {
+        // Re-establish session and CSRF cookie
+        const rootResponse = await this.httpClient
+          .get('/', { withXSRFToken: true })
+          .catch((err) => err.response)
+
+        if (rootResponse?.data) {
+          const cookie =
+            /<script>document.cookie = '(XSRF-TOKEN=.*; Max-Age=86400; SameSite=Strict; Path=\/;)'<\/script>/.exec(
+              rootResponse.data
+            )?.[1]
+
+          if (cookie && typeof document !== 'undefined') {
+            document.cookie = cookie
+          }
+
+          this.parseAndSetCsrfToken(rootResponse)
+        }
+
+        return await callback()
+      } catch {
+        // Session could not be recovered — surface LoginRequiredError
+        throw new LoginRequiredError()
+      } finally {
+        this.isRecoveringFromNetworkError = false
+      }
+    }
+
     if (e.message) throw e
     else throw prefixMessage(e, 'Error while handling error. ')
   }
diff --git a/src/request/Sas9RequestClient.ts b/src/request/Sas9RequestClient.ts
index d4a249e..43ccc0a 100644
--- a/src/request/Sas9RequestClient.ts
+++ b/src/request/Sas9RequestClient.ts
@@ -23,6 +23,13 @@ export class Sas9RequestClient extends RequestClient {
     }
   }
 
+  public resetInMemoryAuthState() {
+    super.resetInMemoryAuthState()
+    if (this.httpClient.defaults.jar) {
+      ;(this.httpClient.defaults.jar as tough.CookieJar).removeAllCookiesSync()
+    }
+  }
+
   public async login(username: string, password: string, jobsPath: string) {
     const codeInjectorPath = `/User Folders/${username}/My Folder/sasjs/runner`
     if (this.httpClient.defaults.jar) {
diff --git a/src/test/RequestClient.spec.ts b/src/test/RequestClient.spec.ts
index 992b1f7..5e085ed 100644
--- a/src/test/RequestClient.spec.ts
+++ b/src/test/RequestClient.spec.ts
@@ -589,6 +589,42 @@ ${resHeaders[0]}: ${resHeaders[1]}${
         requestClient['handleError'](error, () => {}, false)
       ).resolves.toEqual(undefined)
     })
+
+    it('should clear CSRF and retry once on opaque ERR_NETWORK', async () => {
+      const networkError = {
+        isAxiosError: true,
+        code: 'ERR_NETWORK',
+        message: 'Network Error'
+      }
+      requestClient['csrfToken'] = { headerName: 'h', value: 'v' }
+      const callback = jest.fn().mockResolvedValue('ok')
+
+      await expect(
+        requestClient['handleError'](networkError, callback)
+      ).resolves.toEqual('ok')
+
+      expect(callback).toHaveBeenCalledTimes(1)
+      expect(requestClient['csrfToken']).toEqual({ headerName: '', value: '' })
+    })
+
+    it('should throw LoginRequiredError if retry also fails with ERR_NETWORK', async () => {
+      const networkError = {
+        isAxiosError: true,
+        code: 'ERR_NETWORK',
+        message: 'Network Error'
+      }
+      const innerHandle = jest.fn(() =>
+        requestClient['handleError'](networkError, () =>
+          Promise.reject(networkError)
+        )
+      )
+
+      await expect(
+        requestClient['handleError'](networkError, innerHandle)
+      ).rejects.toThrow(LoginRequiredError)
+
+      expect(innerHandle).toHaveBeenCalledTimes(1)
+    })
   })
 })