diff --git a/model/hosts.go b/model/hosts.go
index 065b77c..e5627ee 100644
--- a/model/hosts.go
+++ b/model/hosts.go
@@ -49,6 +49,7 @@ type Hosts struct {
 	CustomHeadersJSON         string `gorm:"type:text" json:"custom_headers_json"`          //自定义头信息配置 json
 	CustomResponseHeadersJSON string `gorm:"type:text" json:"custom_response_headers_json"` //自定义响应头信息配置 json
 	ResponseCompressJSON      string `gorm:"type:text" json:"response_compress_json"`       //响应压缩配置 json（Gzip/Brotli/Zstd）
+	CookieSecurityJSON        string `gorm:"type:text" json:"cookie_security_json"`         //Cookie安全保护配置 json（HttpOnly/Secure/SameSite）
 	IPMode                    string `gorm:"size:20" json:"ip_mode"`                        //IP提取模式: "nic" 网卡模式 或 "proxy" 代理模式
 }
 
@@ -187,6 +188,33 @@ type ResponseCompressConfig struct {
 	CompressWhenStaticAssist int    `json:"compress_when_static_assist"` // 1 时对静态协助响应也读体压缩
 }
 
+// CookieSecurityConfig Cookie 安全保护（应答方向给后端下发的 Set-Cookie 补齐安全属性）
+// 设计原则：缺失才补——仅在对应属性缺失时追加，绝不覆盖应用已设的值，保留原 cookie 全部内容。
+type CookieSecurityConfig struct {
+	IsEnable       int    `json:"is_enable"`       // 1 开启 0 关闭（默认0，老站点不受影响）
+	HttpOnly       int    `json:"http_only"`       // 1 缺失时补 HttpOnly / 0 不动（默认1）
+	Secure         int    `json:"secure"`          // 0 不动 / 1 强制补 / 2 仅 HTTPS 自动补（默认2）
+	SameSite       string `json:"same_site"`       // "" 不动 / Lax / Strict / None（默认Lax）
+	ExcludeCookies string `json:"exclude_cookies"` // 排除的 cookie 名，逗号分隔（如三方/SSO cookie 原样放过）
+}
+
+// ParseCookieSecurityConfig 解析 Cookie 安全保护配置；空 JSON 给安全默认值（但默认关闭）
+func ParseCookieSecurityConfig(jsonStr string) CookieSecurityConfig {
+	c := CookieSecurityConfig{
+		IsEnable: 0,
+		HttpOnly: 1,
+		Secure:   2,
+		SameSite: "Lax",
+	}
+	if jsonStr == "" {
+		return c
+	}
+	if err := json.Unmarshal([]byte(jsonStr), &c); err != nil {
+		return CookieSecurityConfig{IsEnable: 0, HttpOnly: 1, Secure: 2, SameSite: "Lax"}
+	}
+	return c
+}
+
 // TransportConfig 传输配置
 type TransportConfig struct {
 	MaxIdleConns          int `json:"max_idle_conns"`          // 最大空闲连接数
diff --git a/model/request/waf_host_req.go b/model/request/waf_host_req.go
index 1cc4b54..7dc0885 100644
--- a/model/request/waf_host_req.go
+++ b/model/request/waf_host_req.go
@@ -43,6 +43,7 @@ type WafHostAddReq struct {
 	CustomHeadersJSON         string `json:"custom_headers_json"`          //自定义头信息配置 json
 	CustomResponseHeadersJSON string `json:"custom_response_headers_json"` //自定义响应头信息配置 json
 	ResponseCompressJSON      string `json:"response_compress_json"`       //响应压缩配置 json
+	CookieSecurityJSON        string `json:"cookie_security_json"`         //Cookie安全保护配置 json
 	IPMode                    string `json:"ip_mode"`                      //IP提取模式: "nic" 网卡模式 或 "proxy" 代理模式
 }
 
@@ -95,6 +96,7 @@ type WafHostEditReq struct {
 	CustomHeadersJSON         string `json:"custom_headers_json"`          //自定义头信息配置 json
 	CustomResponseHeadersJSON string `json:"custom_response_headers_json"` //自定义响应头信息配置 json
 	ResponseCompressJSON      string `json:"response_compress_json"`       //响应压缩配置 json
+	CookieSecurityJSON        string `json:"cookie_security_json"`         //Cookie安全保护配置 json
 	IPMode                    string `json:"ip_mode"`                      //IP提取模式: "nic" 网卡模式 或 "proxy" 代理模式
 }
 type WafHostGuardStatusReq struct {
diff --git a/service/waf_service/waf_host.go b/service/waf_service/waf_host.go
index b3e4279..77161e8 100644
--- a/service/waf_service/waf_host.go
+++ b/service/waf_service/waf_host.go
@@ -101,6 +101,7 @@ func (receiver *WafHostService) AddApi(wafHostAddReq request.WafHostAddReq) (str
 		CustomHeadersJSON:         wafHostAddReq.CustomHeadersJSON,
 		CustomResponseHeadersJSON: wafHostAddReq.CustomResponseHeadersJSON,
 		ResponseCompressJSON:      wafHostAddReq.ResponseCompressJSON,
+		CookieSecurityJSON:        wafHostAddReq.CookieSecurityJSON,
 		IPMode:                    wafHostAddReq.IPMode,
 	}
 	global.GWAF_LOCAL_DB.Create(wafHost)
@@ -166,6 +167,7 @@ func (receiver *WafHostService) ModifyApi(wafHostEditReq request.WafHostEditReq)
 		"CustomHeadersJSON":         wafHostEditReq.CustomHeadersJSON,
 		"CustomResponseHeadersJSON": wafHostEditReq.CustomResponseHeadersJSON,
 		"ResponseCompressJSON":      wafHostEditReq.ResponseCompressJSON,
+		"CookieSecurityJSON":        wafHostEditReq.CookieSecurityJSON,
 		"IPMode":                    wafHostEditReq.IPMode,
 	}
 	err := global.GWAF_LOCAL_DB.Debug().Model(model.Hosts{}).Where("CODE=?", wafHostEditReq.CODE).Updates(hostMap).Error
diff --git a/wafdb/migrations_core.go b/wafdb/migrations_core.go
index d7d5021..c688aed 100644
--- a/wafdb/migrations_core.go
+++ b/wafdb/migrations_core.go
@@ -1037,6 +1037,32 @@ func RunCoreDBMigrations(db *gorm.DB) error {
 				return nil
 			},
 		},
+		{
+			ID: "202606300001_add_hosts_cookie_security_json",
+			Migrate: func(tx *gorm.DB) error {
+				zlog.Info("迁移 202606300001: 为 hosts 表添加 cookie_security_json 字段")
+				if tx.Migrator().HasColumn(&model.Hosts{}, "cookie_security_json") {
+					zlog.Info("cookie_security_json 字段已存在，跳过添加")
+					return nil
+				}
+				if err := tx.Migrator().AddColumn(&model.Hosts{}, "cookie_security_json"); err != nil {
+					return fmt.Errorf("添加 cookie_security_json 字段失败: %w", err)
+				}
+				defaultJSON := `{"is_enable":0,"http_only":1,"secure":2,"same_site":"Lax","exclude_cookies":""}`
+				if err := tx.Exec("UPDATE hosts SET cookie_security_json = ? WHERE cookie_security_json IS NULL OR cookie_security_json = ''", defaultJSON).Error; err != nil {
+					zlog.Warn("设置 cookie_security_json 默认值失败", "error", err.Error())
+				}
+				zlog.Info("cookie_security_json 字段添加成功")
+				return nil
+			},
+			Rollback: func(tx *gorm.DB) error {
+				zlog.Info("回滚 202606300001: 删除 hosts 表的 cookie_security_json 字段")
+				if tx.Migrator().HasColumn(&model.Hosts{}, "cookie_security_json") {
+					return tx.Migrator().DropColumn(&model.Hosts{}, "cookie_security_json")
+				}
+				return nil
+			},
+		},
 		{
 			ID: "202606290001_add_rbac_and_password_policy",
 			Migrate: func(tx *gorm.DB) error {
diff --git a/wafenginecore/cookie_security.go b/wafenginecore/cookie_security.go
new file mode 100644
index 0000000..119019b
--- /dev/null
+++ b/wafenginecore/cookie_security.go
@@ -0,0 +1,62 @@
+package wafenginecore
+
+import (
+	"SamWaf/model"
+	"strings"
+)
+
+// secureSetCookie 对单条 Set-Cookie 头按策略「缺失才补」安全属性。
+// 保留原 Set-Cookie 的全部内容（Path/Domain/Max-Age/Expires/未知属性），仅在缺失时追加：
+//   - HttpOnly：cfg.HttpOnly==1 且原值无 httponly 时追加
+//   - Secure  ：cfg.Secure==1 强制；==2 仅当 isHTTPS；SameSite=None 也强制（None 要求 Secure）
+//   - SameSite：cfg.SameSite 非空且原值无 samesite 时追加
+//
+// 安全要点：HTTP 下 Secure==2 不追加 Secure，否则 cookie 会失效。
+func secureSetCookie(raw string, isHTTPS bool, cfg model.CookieSecurityConfig) string {
+	if strings.TrimSpace(raw) == "" {
+		return raw
+	}
+
+	// 提取 cookie 名（第一个 '=' 前的串），命中排除名单则原样返回
+	name := raw
+	if idx := strings.Index(raw, "="); idx >= 0 {
+		name = raw[:idx]
+	}
+	name = strings.TrimSpace(name)
+	if isExcludedCookie(name, cfg.ExcludeCookies) {
+		return raw
+	}
+
+	lower := strings.ToLower(raw)
+
+	if cfg.HttpOnly == 1 && !strings.Contains(lower, "httponly") {
+		raw += "; HttpOnly"
+		lower = strings.ToLower(raw)
+	}
+
+	needSecure := cfg.Secure == 1 || (cfg.Secure == 2 && isHTTPS) || cfg.SameSite == "None"
+	if needSecure && !strings.Contains(lower, "secure") {
+		raw += "; Secure"
+		lower = strings.ToLower(raw)
+	}
+
+	if cfg.SameSite != "" && !strings.Contains(lower, "samesite") {
+		raw += "; SameSite=" + cfg.SameSite
+	}
+
+	return raw
+}
+
+// isExcludedCookie 判断 cookie 名是否在排除名单（逗号分隔，大小写不敏感）
+func isExcludedCookie(name, excludeCookies string) bool {
+	if excludeCookies == "" {
+		return false
+	}
+	for _, ex := range strings.Split(excludeCookies, ",") {
+		ex = strings.TrimSpace(ex)
+		if ex != "" && strings.EqualFold(ex, name) {
+			return true
+		}
+	}
+	return false
+}
diff --git a/wafenginecore/cookie_security_test.go b/wafenginecore/cookie_security_test.go
new file mode 100644
index 0000000..f41fb5e
--- /dev/null
+++ b/wafenginecore/cookie_security_test.go
@@ -0,0 +1,125 @@
+package wafenginecore
+
+import (
+	"SamWaf/model"
+	"strings"
+	"testing"
+)
+
+func TestSecureSetCookie(t *testing.T) {
+	full := model.CookieSecurityConfig{IsEnable: 1, HttpOnly: 1, Secure: 2, SameSite: "Lax"}
+
+	tests := []struct {
+		name        string
+		raw         string
+		isHTTPS     bool
+		cfg         model.CookieSecurityConfig
+		wantContain []string
+		wantAbsent  []string
+	}{
+		{
+			name:        "https adds all when missing",
+			raw:         "sid=abc; Path=/",
+			isHTTPS:     true,
+			cfg:         full,
+			wantContain: []string{"sid=abc", "Path=/", "HttpOnly", "Secure", "SameSite=Lax"},
+		},
+		{
+			name:        "http secure auto (mode2) does NOT add Secure",
+			raw:         "sid=abc; Path=/",
+			isHTTPS:     false,
+			cfg:         full,
+			wantContain: []string{"HttpOnly", "SameSite=Lax"},
+			wantAbsent:  []string{"Secure"},
+		},
+		{
+			name:        "secure force (mode1) adds even on http",
+			raw:         "sid=abc",
+			isHTTPS:     false,
+			cfg:         model.CookieSecurityConfig{IsEnable: 1, Secure: 1},
+			wantContain: []string{"Secure"},
+		},
+		{
+			name:       "secure off (mode0) never adds",
+			raw:        "sid=abc",
+			isHTTPS:    true,
+			cfg:        model.CookieSecurityConfig{IsEnable: 1, Secure: 0},
+			wantAbsent: []string{"Secure"},
+		},
+		{
+			name:        "does not duplicate existing httponly (case-insensitive)",
+			raw:         "sid=abc; httponly",
+			isHTTPS:     true,
+			cfg:         model.CookieSecurityConfig{IsEnable: 1, HttpOnly: 1},
+			wantContain: []string{"httponly"},
+			wantAbsent:  []string{"HttpOnly"}, // 不应再追加首字母大写的副本
+		},
+		{
+			name:        "does not override existing samesite",
+			raw:         "sid=abc; SameSite=Strict",
+			isHTTPS:     true,
+			cfg:         model.CookieSecurityConfig{IsEnable: 1, SameSite: "Lax"},
+			wantContain: []string{"SameSite=Strict"},
+			wantAbsent:  []string{"SameSite=Lax"},
+		},
+		{
+			name:        "samesite none forces secure",
+			raw:         "sid=abc",
+			isHTTPS:     false,
+			cfg:         model.CookieSecurityConfig{IsEnable: 1, Secure: 2, SameSite: "None"},
+			wantContain: []string{"SameSite=None", "Secure"},
+		},
+		{
+			name:        "excluded cookie untouched",
+			raw:         "_ga=GA1.2.3; Path=/",
+			isHTTPS:     true,
+			cfg:         model.CookieSecurityConfig{IsEnable: 1, HttpOnly: 1, Secure: 1, SameSite: "Lax", ExcludeCookies: "_ga, sso_token"},
+			wantContain: []string{"_ga=GA1.2.3; Path=/"},
+			wantAbsent:  []string{"HttpOnly", "Secure", "SameSite"},
+		},
+		{
+			name:        "preserves original and unknown attributes",
+			raw:         "sid=abc; Path=/app; Domain=example.com; Max-Age=3600; Priority=High",
+			isHTTPS:     true,
+			cfg:         full,
+			wantContain: []string{"Path=/app", "Domain=example.com", "Max-Age=3600", "Priority=High", "HttpOnly", "Secure"},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := secureSetCookie(tt.raw, tt.isHTTPS, tt.cfg)
+			for _, c := range tt.wantContain {
+				if !strings.Contains(got, c) {
+					t.Errorf("expected result to contain %q, got %q", c, got)
+				}
+			}
+			for _, a := range tt.wantAbsent {
+				if strings.Contains(got, a) {
+					t.Errorf("expected result to NOT contain %q, got %q", a, got)
+				}
+			}
+		})
+	}
+}
+
+func TestSecureSetCookieEmptyRaw(t *testing.T) {
+	if got := secureSetCookie("", true, model.CookieSecurityConfig{IsEnable: 1, HttpOnly: 1}); got != "" {
+		t.Errorf("empty raw should stay empty, got %q", got)
+	}
+}
+
+func TestIsExcludedCookie(t *testing.T) {
+	if !isExcludedCookie("_ga", "_ga, foo") {
+		t.Error("_ga should be excluded")
+	}
+	if !isExcludedCookie("FOO", "_ga, foo") {
+		t.Error("case-insensitive match expected")
+	}
+	if isExcludedCookie("bar", "_ga, foo") {
+		t.Error("bar should not be excluded")
+	}
+	if isExcludedCookie("bar", "") {
+		t.Error("empty exclude list excludes nothing")
+	}
+}
diff --git a/wafenginecore/wafengine.go b/wafenginecore/wafengine.go
index 12a2c60..a42d85b 100644
--- a/wafenginecore/wafengine.go
+++ b/wafenginecore/wafengine.go
@@ -1018,6 +1018,27 @@ func (waf *WafEngine) modifyResponse() func(*http.Response) error {
 			}
 		}
 
+		// Cookie 安全保护：缺失才补 HttpOnly/Secure/SameSite（按站点配置）
+		if wafCtx, ok := r.Context().Value("waf_context").(innerbean.WafHttpContextData); ok {
+			host := waf.rt().HostCode[wafCtx.HostCode]
+			if hostTarget, exists := waf.rt().HostTarget[host]; exists {
+				cookieCfg := model.ParseCookieSecurityConfig(hostTarget.Host.CookieSecurityJSON)
+				if cookieCfg.IsEnable == 1 {
+					if lines := resp.Header.Values("Set-Cookie"); len(lines) > 0 {
+						isHTTPS := r.TLS != nil
+						secured := make([]string, 0, len(lines))
+						for _, l := range lines {
+							secured = append(secured, secureSetCookie(l, isHTTPS, cookieCfg))
+						}
+						resp.Header.Del("Set-Cookie")
+						for _, l := range secured {
+							resp.Header.Add("Set-Cookie", l)
+						}
+					}
+				}
+			}
+		}
+
 		// 检查是否为WebSocket协议切换
 		if resp.StatusCode == http.StatusSwitchingProtocols {